From eb21628ee42406e1e5cb351fcd846fd4cb8a1972 Mon Sep 17 00:00:00 2001
From: Meier Lukas <meierschlumpf@gmail.com>
Date: Mon, 7 Oct 2024 21:13:15 +0200
Subject: [PATCH] refactor: replace signIn callback with signIn event, adjust
 getUserByEmail in adapter to check provider (#1223)

* refactor: replace signIn callback with signIn event, adjust getUserByEmail in adapter to check provider

* test: adjusting tests for adapter and events

* docs: add comments for unknown auth provider

* fix: missing dayjs import
---
 .../app/[locale]/auth/login/_login-form.tsx   |  27 +--
 .../src/app/api/auth/[...nextauth]/route.ts   |  28 ++-
 packages/auth/adapter.ts                      |  44 +++-
 packages/auth/callbacks.ts                    |  50 -----
 packages/auth/configuration.ts                |  21 +-
 packages/auth/env.mjs                         |   2 +
 packages/auth/events.ts                       | 131 ++++++++++++
 packages/auth/index.ts                        |   5 +-
 packages/auth/next.ts                         |   2 +-
 .../authorization/ldap-authorization.ts       |  87 +-------
 .../credentials/credentials-provider.ts       |  31 ++-
 .../test/basic-authorization.spec.ts          |   4 -
 .../providers/test/ldap-authorization.spec.ts |  96 +--------
 packages/auth/session.ts                      |   3 +-
 packages/auth/test/adapter.spec.ts            |  67 ++++++
 packages/auth/test/callbacks.spec.ts          | 154 +-------------
 packages/auth/test/events.spec.ts             | 190 ++++++++++++++++++
 packages/validation/src/user.ts               |   1 -
 turbo.json                                    |   1 +
 19 files changed, 521 insertions(+), 423 deletions(-)
 create mode 100644 packages/auth/events.ts
 create mode 100644 packages/auth/test/adapter.spec.ts
 create mode 100644 packages/auth/test/events.spec.ts

diff --git a/apps/nextjs/src/app/[locale]/auth/login/_login-form.tsx b/apps/nextjs/src/app/[locale]/auth/login/_login-form.tsx
index 0c745c656..f4ce00f67 100644
--- a/apps/nextjs/src/app/[locale]/auth/login/_login-form.tsx
+++ b/apps/nextjs/src/app/[locale]/auth/login/_login-form.tsx
@@ -12,8 +12,7 @@ import type { useForm } from "@homarr/form";
 import { useZodForm } from "@homarr/form";
 import { showErrorNotification, showSuccessNotification } from "@homarr/notifications";
 import { useScopedI18n } from "@homarr/translation/client";
-import type { z } from "@homarr/validation";
-import { validation } from "@homarr/validation";
+import { validation, z } from "@homarr/validation";
 
 interface LoginFormProps {
   providers: string[];
@@ -22,15 +21,17 @@ interface LoginFormProps {
   callbackUrl: string;
 }
 
+const extendedValidation = validation.user.signIn.extend({ provider: z.enum(["credentials", "ldap"]) });
+
 export const LoginForm = ({ providers, oidcClientName, isOidcAutoLoginEnabled, callbackUrl }: LoginFormProps) => {
   const t = useScopedI18n("user");
   const router = useRouter();
   const [isPending, setIsPending] = useState(false);
-  const form = useZodForm(validation.user.signIn, {
+  const form = useZodForm(extendedValidation, {
     initialValues: {
       name: "",
       password: "",
-      credentialType: "basic",
+      provider: "credentials",
     },
   });
 
@@ -95,14 +96,14 @@ export const LoginForm = ({ providers, oidcClientName, isOidcAutoLoginEnabled, c
       <Stack gap="lg">
         {credentialInputsVisible && (
           <>
-            <form onSubmit={form.onSubmit((credentials) => void signInAsync("credentials", credentials))}>
+            <form onSubmit={form.onSubmit((credentials) => void signInAsync(credentials.provider, credentials))}>
               <Stack gap="lg">
                 <TextInput label={t("field.username.label")} {...form.getInputProps("name")} />
                 <PasswordInput label={t("field.password.label")} {...form.getInputProps("password")} />
 
                 {providers.includes("credentials") && (
                   <Stack gap="sm">
-                    <SubmitButton isPending={isPending} form={form} credentialType="basic">
+                    <SubmitButton isPending={isPending} form={form} provider="credentials">
                       {t("action.login.label")}
                     </SubmitButton>
                     <PasswordForgottenCollapse username={form.values.name} />
@@ -110,7 +111,7 @@ export const LoginForm = ({ providers, oidcClientName, isOidcAutoLoginEnabled, c
                 )}
 
                 {providers.includes("ldap") && (
-                  <SubmitButton isPending={isPending} form={form} credentialType="ldap">
+                  <SubmitButton isPending={isPending} form={form} provider="ldap">
                     {t("action.login.labelWith", { provider: "LDAP" })}
                   </SubmitButton>
                 )}
@@ -133,18 +134,18 @@ export const LoginForm = ({ providers, oidcClientName, isOidcAutoLoginEnabled, c
 interface SubmitButtonProps {
   isPending: boolean;
   form: ReturnType<typeof useForm<FormType, (values: FormType) => FormType>>;
-  credentialType: "basic" | "ldap";
+  provider: "credentials" | "ldap";
 }
 
-const SubmitButton = ({ isPending, form, credentialType, children }: PropsWithChildren<SubmitButtonProps>) => {
-  const isCurrentProviderActive = form.getValues().credentialType === credentialType;
+const SubmitButton = ({ isPending, form, provider, children }: PropsWithChildren<SubmitButtonProps>) => {
+  const isCurrentProviderActive = form.getValues().provider === provider;
 
   return (
     <Button
       type="submit"
-      name={credentialType}
+      name={provider}
       fullWidth
-      onClick={() => form.setFieldValue("credentialType", credentialType)}
+      onClick={() => form.setFieldValue("provider", provider)}
       loading={isPending && isCurrentProviderActive}
       disabled={isPending && !isCurrentProviderActive}
     >
@@ -181,4 +182,4 @@ const PasswordForgottenCollapse = ({ username }: PasswordForgottenCollapseProps)
   );
 };
 
-type FormType = z.infer<typeof validation.user.signIn>;
+type FormType = z.infer<typeof extendedValidation>;
diff --git a/apps/nextjs/src/app/api/auth/[...nextauth]/route.ts b/apps/nextjs/src/app/api/auth/[...nextauth]/route.ts
index 0c17a094e..7aae12a0d 100644
--- a/apps/nextjs/src/app/api/auth/[...nextauth]/route.ts
+++ b/apps/nextjs/src/app/api/auth/[...nextauth]/route.ts
@@ -1,17 +1,37 @@
 import { NextRequest } from "next/server";
 
 import { createHandlers } from "@homarr/auth";
+import type { SupportedAuthProvider } from "@homarr/definitions";
 import { logger } from "@homarr/log";
 
 export const GET = async (req: NextRequest) => {
-  return await createHandlers(isCredentialsRequest(req)).handlers.GET(reqWithTrustedOrigin(req));
+  return await createHandlers(extractProvider(req)).handlers.GET(reqWithTrustedOrigin(req));
 };
 export const POST = async (req: NextRequest) => {
-  return await createHandlers(isCredentialsRequest(req)).handlers.POST(reqWithTrustedOrigin(req));
+  return await createHandlers(extractProvider(req)).handlers.POST(reqWithTrustedOrigin(req));
 };
 
-const isCredentialsRequest = (req: NextRequest) => {
-  return req.url.includes("credentials") && req.method === "POST";
+/**
+ * This method extracts the used provider from the url and allows us to override the getUserByEmail method in the adapter.
+ * @param req request containing the url
+ * @returns the provider or "unknown" if the provider could not be extracted
+ */
+const extractProvider = (req: NextRequest): SupportedAuthProvider | "unknown" => {
+  const url = new URL(req.url);
+
+  if (url.pathname.includes("oidc")) {
+    return "oidc";
+  }
+
+  if (url.pathname.includes("credentials")) {
+    return "credentials";
+  }
+
+  if (url.pathname.includes("ldap")) {
+    return "ldap";
+  }
+
+  return "unknown";
 };
 
 /**
diff --git a/packages/auth/adapter.ts b/packages/auth/adapter.ts
index 4c2929613..71b4ed176 100644
--- a/packages/auth/adapter.ts
+++ b/packages/auth/adapter.ts
@@ -1,5 +1,45 @@
+import type { Adapter } from "@auth/core/adapters";
 import { DrizzleAdapter } from "@auth/drizzle-adapter";
 
-import { db } from "@homarr/db";
+import type { Database } from "@homarr/db";
+import { and, eq } from "@homarr/db";
+import { accounts, users } from "@homarr/db/schema/sqlite";
+import type { SupportedAuthProvider } from "@homarr/definitions";
 
-export const adapter = DrizzleAdapter(db);
+export const createAdapter = (db: Database, provider: SupportedAuthProvider | "unknown"): Adapter => {
+  const drizzleAdapter = DrizzleAdapter(db, { usersTable: users, accountsTable: accounts });
+
+  return {
+    ...drizzleAdapter,
+    // We override the default implementation as we want to have a provider
+    // flag in the user instead of the account to not intermingle users from different providers
+    // eslint-disable-next-line no-restricted-syntax
+    getUserByEmail: async (email) => {
+      if (provider === "unknown") {
+        throw new Error("Unable to get user by email for unknown provider");
+      }
+
+      const user = await db.query.users.findFirst({
+        where: and(eq(users.email, email), eq(users.provider, provider)),
+        columns: {
+          id: true,
+          name: true,
+          email: true,
+          emailVerified: true,
+          image: true,
+        },
+      });
+
+      if (!user) {
+        return null;
+      }
+
+      return {
+        ...user,
+        // We allow null as email for credentials provider
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        email: user.email!,
+      };
+    },
+  };
+};
diff --git a/packages/auth/callbacks.ts b/packages/auth/callbacks.ts
index 655b2db89..6a381f57a 100644
--- a/packages/auth/callbacks.ts
+++ b/packages/auth/callbacks.ts
@@ -1,5 +1,3 @@
-import { cookies } from "next/headers";
-import type { Adapter } from "@auth/core/adapters";
 import dayjs from "dayjs";
 import type { NextAuthConfig } from "next-auth";
 
@@ -9,9 +7,6 @@ import { eq, inArray } from "@homarr/db";
 import { groupMembers, groupPermissions, users } from "@homarr/db/schema/sqlite";
 import { getPermissionsWithChildren } from "@homarr/definitions";
 
-import { env } from "./env.mjs";
-import { expireDateAfter, generateSessionToken, sessionTokenCookieName } from "./session";
-
 export const getCurrentUserPermissionsAsync = async (db: Database, userId: string) => {
   const dbGroupMembers = await db.query.groupMembers.findMany({
     where: eq(groupMembers.userId, userId),
@@ -68,51 +63,6 @@ export const createSessionCallback = (db: Database): NextAuthCallbackOf<"session
   };
 };
 
-export const createSignInCallback =
-  (adapter: Adapter, db: Database, isCredentialsRequest: boolean): NextAuthCallbackOf<"signIn"> =>
-  async ({ user }) => {
-    if (!isCredentialsRequest) return true;
-
-    // https://github.com/nextauthjs/next-auth/issues/6106
-    if (!adapter.createSession || !user.id) {
-      return false;
-    }
-
-    const sessionToken = generateSessionToken();
-    const sessionExpires = expireDateAfter(env.AUTH_SESSION_EXPIRY_TIME);
-
-    await adapter.createSession({
-      sessionToken,
-      userId: user.id,
-      expires: sessionExpires,
-    });
-
-    cookies().set(sessionTokenCookieName, sessionToken, {
-      path: "/",
-      expires: sessionExpires,
-      httpOnly: true,
-      sameSite: "lax",
-      secure: true,
-    });
-
-    const dbUser = await db.query.users.findFirst({
-      where: eq(users.id, user.id),
-      columns: {
-        colorScheme: true,
-      },
-    });
-
-    if (!dbUser) return false;
-
-    // We use a cookie as localStorage is not shared with server (otherwise flickering would occur)
-    cookies().set("homarr-color-scheme", dbUser.colorScheme, {
-      path: "/",
-      expires: dayjs().add(1, "year").toDate(),
-    });
-
-    return true;
-  };
-
 type NextAuthCallbackRecord = Exclude<NextAuthConfig["callbacks"], undefined>;
 export type NextAuthCallbackOf<TKey extends keyof NextAuthCallbackRecord> = Exclude<
   NextAuthCallbackRecord[TKey],
diff --git a/packages/auth/configuration.ts b/packages/auth/configuration.ts
index a3945a064..3a3fee360 100644
--- a/packages/auth/configuration.ts
+++ b/packages/auth/configuration.ts
@@ -4,18 +4,21 @@ import NextAuth from "next-auth";
 import Credentials from "next-auth/providers/credentials";
 
 import { db } from "@homarr/db";
+import type { SupportedAuthProvider } from "@homarr/definitions";
 
-import { adapter } from "./adapter";
-import { createSessionCallback, createSignInCallback } from "./callbacks";
+import { createAdapter } from "./adapter";
+import { createSessionCallback } from "./callbacks";
 import { env } from "./env.mjs";
-import { createCredentialsConfiguration } from "./providers/credentials/credentials-provider";
+import { createSignInEventHandler } from "./events";
+import { createCredentialsConfiguration, createLdapConfiguration } from "./providers/credentials/credentials-provider";
 import { EmptyNextAuthProvider } from "./providers/empty/empty-provider";
 import { filterProviders } from "./providers/filter-providers";
 import { OidcProvider } from "./providers/oidc/oidc-provider";
 import { createRedirectUri } from "./redirect";
-import { sessionTokenCookieName } from "./session";
+import { generateSessionToken, sessionTokenCookieName } from "./session";
 
-export const createConfiguration = (isCredentialsRequest: boolean, headers: ReadonlyHeaders | null) =>
+// See why it's unknown in the [...nextauth]/route.ts file
+export const createConfiguration = (provider: SupportedAuthProvider | "unknown", headers: ReadonlyHeaders | null) =>
   NextAuth({
     logger: {
       error: (code, ...message) => {
@@ -30,21 +33,25 @@ export const createConfiguration = (isCredentialsRequest: boolean, headers: Read
       },
     },
     trustHost: true,
-    adapter,
+    adapter: createAdapter(db, provider),
     providers: filterProviders([
       Credentials(createCredentialsConfiguration(db)),
+      Credentials(createLdapConfiguration(db)),
       EmptyNextAuthProvider(),
       OidcProvider(headers),
     ]),
     callbacks: {
       session: createSessionCallback(db),
-      signIn: createSignInCallback(adapter, db, isCredentialsRequest),
+    },
+    events: {
+      signIn: createSignInEventHandler(db),
     },
     redirectProxyUrl: createRedirectUri(headers, "/api/auth"),
     secret: "secret-is-not-defined-yet", // TODO: This should be added later
     session: {
       strategy: "database",
       maxAge: env.AUTH_SESSION_EXPIRY_TIME,
+      generateSessionToken,
     },
     pages: {
       signIn: "/auth/login",
diff --git a/packages/auth/env.mjs b/packages/auth/env.mjs
index d8f7b3121..de1faa36f 100644
--- a/packages/auth/env.mjs
+++ b/packages/auth/env.mjs
@@ -74,6 +74,7 @@ export const env = createEnv({
           AUTH_OIDC_CLIENT_NAME: z.string().min(1).default("OIDC"),
           AUTH_OIDC_AUTO_LOGIN: booleanSchema,
           AUTH_OIDC_SCOPE_OVERWRITE: z.string().min(1).default("openid email profile groups"),
+          AUTH_OIDC_GROUPS_ATTRIBUTE: z.string().default("groups"), // Is used in the signIn event to assign the correct groups, key is from object of decoded id_token
         }
       : {}),
     ...(authProviders.includes("ldap")
@@ -113,6 +114,7 @@ export const env = createEnv({
     AUTH_OIDC_CLIENT_SECRET: process.env.AUTH_OIDC_CLIENT_SECRET,
     AUTH_OIDC_ISSUER: process.env.AUTH_OIDC_ISSUER,
     AUTH_OIDC_SCOPE_OVERWRITE: process.env.AUTH_OIDC_SCOPE_OVERWRITE,
+    AUTH_OIDC_GROUPS_ATTRIBUTE: process.env.AUTH_OIDC_GROUPS_ATTRIBUTE,
     AUTH_LDAP_USERNAME_ATTRIBUTE: process.env.AUTH_LDAP_USERNAME_ATTRIBUTE,
     AUTH_LDAP_USER_MAIL_ATTRIBUTE: process.env.AUTH_LDAP_USER_MAIL_ATTRIBUTE,
     AUTH_LDAP_USERNAME_FILTER_EXTRA_ARG: process.env.AUTH_LDAP_USERNAME_FILTER_EXTRA_ARG,
diff --git a/packages/auth/events.ts b/packages/auth/events.ts
new file mode 100644
index 000000000..f4cd1eeac
--- /dev/null
+++ b/packages/auth/events.ts
@@ -0,0 +1,131 @@
+import { cookies } from "next/headers";
+import dayjs from "dayjs";
+import type { NextAuthConfig } from "next-auth";
+
+import { and, eq, inArray } from "@homarr/db";
+import type { Database } from "@homarr/db";
+import { groupMembers, groups, users } from "@homarr/db/schema/sqlite";
+import { logger } from "@homarr/log";
+
+import { env } from "./env.mjs";
+
+export const createSignInEventHandler = (db: Database): Exclude<NextAuthConfig["events"], undefined>["signIn"] => {
+  return async ({ user, profile }) => {
+    if (!user.id) throw new Error("User ID is missing");
+
+    const dbUser = await db.query.users.findFirst({
+      where: eq(users.id, user.id),
+      columns: {
+        name: true,
+        colorScheme: true,
+      },
+    });
+
+    if (!dbUser) throw new Error("User not found");
+
+    const groupsKey = env.AUTH_OIDC_GROUPS_ATTRIBUTE;
+    // Groups from oidc provider are provided from the profile, it's not typed.
+    if (profile && groupsKey in profile && Array.isArray(profile[groupsKey])) {
+      await synchronizeGroupsWithExternalForUserAsync(db, user.id, profile[groupsKey] as string[]);
+    }
+
+    // In ldap-authroization we return the groups from ldap, it's not typed.
+    if ("groups" in user && Array.isArray(user.groups)) {
+      await synchronizeGroupsWithExternalForUserAsync(db, user.id, user.groups as string[]);
+    }
+
+    if (dbUser.name !== user.name) {
+      await db.update(users).set({ name: user.name }).where(eq(users.id, user.id));
+      logger.info(
+        `Username for user of credentials provider has changed. user=${user.id} old=${dbUser.name} new=${user.name}`,
+      );
+    }
+
+    const profileUsername = profile?.preferred_username?.includes("@") ? profile.name : profile?.preferred_username;
+    if (profileUsername && dbUser.name !== profileUsername) {
+      await db.update(users).set({ name: profileUsername }).where(eq(users.id, user.id));
+      logger.info(
+        `Username for user of oidc provider has changed. user=${user.id} old='${dbUser.name}' new='${profileUsername}'`,
+      );
+    }
+
+    // We use a cookie as localStorage is not shared with server (otherwise flickering would occur)
+    cookies().set("homarr-color-scheme", dbUser.colorScheme, {
+      path: "/",
+      expires: dayjs().add(1, "year").toDate(),
+    });
+  };
+};
+
+const synchronizeGroupsWithExternalForUserAsync = async (db: Database, userId: string, externalGroups: string[]) => {
+  const dbGroupMembers = await db.query.groupMembers.findMany({
+    where: eq(groupMembers.userId, userId),
+    with: {
+      group: { columns: { name: true } },
+    },
+  });
+
+  /**
+   * The below groups are those groups the user is part of in the external system, but not in Homarr.
+   * So he has to be added to those groups.
+   */
+  const missingExternalGroupsForUser = externalGroups.filter(
+    (externalGroup) => !dbGroupMembers.some(({ group }) => group.name === externalGroup),
+  );
+
+  if (missingExternalGroupsForUser.length > 0) {
+    logger.debug(
+      `Homarr does not have the user in certain groups. user=${userId} count=${missingExternalGroupsForUser.length}`,
+    );
+
+    const groupIds = await db.query.groups.findMany({
+      columns: {
+        id: true,
+      },
+      where: inArray(groups.name, missingExternalGroupsForUser),
+    });
+
+    logger.debug(`Homarr has found groups in the database user is not in. user=${userId} count=${groupIds.length}`);
+
+    if (groupIds.length > 0) {
+      await db.insert(groupMembers).values(
+        groupIds.map((group) => ({
+          userId,
+          groupId: group.id,
+        })),
+      );
+
+      logger.info(`Added user to groups successfully. user=${userId} count=${groupIds.length}`);
+    } else {
+      logger.debug(`User is already in all groups of Homarr. user=${userId}`);
+    }
+  }
+
+  /**
+   * The below groups are those groups the user is part of in Homarr, but not in the external system.
+   * So he has to be removed from those groups.
+   */
+  const groupsUserIsNoLongerMemberOfExternally = dbGroupMembers.filter(
+    ({ group }) => !externalGroups.includes(group.name),
+  );
+
+  if (groupsUserIsNoLongerMemberOfExternally.length > 0) {
+    logger.debug(
+      `Homarr has the user in certain groups that LDAP does not have. user=${userId} count=${groupsUserIsNoLongerMemberOfExternally.length}`,
+    );
+
+    await db.delete(groupMembers).where(
+      and(
+        eq(groupMembers.userId, userId),
+        inArray(
+          groupMembers.groupId,
+          groupsUserIsNoLongerMemberOfExternally.map(({ groupId }) => groupId),
+        ),
+      ),
+    );
+
+    logger.info(
+      `Removed user from groups successfully. user=${userId} count=${groupsUserIsNoLongerMemberOfExternally.length}`,
+    );
+  }
+};
diff --git a/packages/auth/index.ts b/packages/auth/index.ts
index 1cb226fa2..877574b84 100644
--- a/packages/auth/index.ts
+++ b/packages/auth/index.ts
@@ -1,7 +1,7 @@
 import { headers } from "next/headers";
 import type { DefaultSession } from "@auth/core/types";
 
-import type { ColorScheme, GroupPermissionKey } from "@homarr/definitions";
+import type { ColorScheme, GroupPermissionKey, SupportedAuthProvider } from "@homarr/definitions";
 
 import { createConfiguration } from "./configuration";
 
@@ -19,6 +19,7 @@ declare module "next-auth" {
 
 export * from "./security";
 
-export const createHandlers = (isCredentialsRequest: boolean) => createConfiguration(isCredentialsRequest, headers());
+// See why it's unknown in the [...nextauth]/route.ts file
+export const createHandlers = (provider: SupportedAuthProvider | "unknown") => createConfiguration(provider, headers());
 
 export { getSessionFromTokenAsync as getSessionFromToken, sessionTokenCookieName } from "./session";
diff --git a/packages/auth/next.ts b/packages/auth/next.ts
index 11b66c4cd..c1bb37752 100644
--- a/packages/auth/next.ts
+++ b/packages/auth/next.ts
@@ -2,7 +2,7 @@ import { cache } from "react";
 
 import { createConfiguration } from "./configuration";
 
-const { auth: defaultAuth } = createConfiguration(false, null);
+const { auth: defaultAuth } = createConfiguration("unknown", null);
 
 /**
  * This is the main way to get session data for your RSCs.
diff --git a/packages/auth/providers/credentials/authorization/ldap-authorization.ts b/packages/auth/providers/credentials/authorization/ldap-authorization.ts
index d54101898..cae75f693 100644
--- a/packages/auth/providers/credentials/authorization/ldap-authorization.ts
+++ b/packages/auth/providers/credentials/authorization/ldap-authorization.ts
@@ -1,8 +1,8 @@
 import { CredentialsSignin } from "@auth/core/errors";
 
 import type { Database, InferInsertModel } from "@homarr/db";
-import { and, createId, eq, inArray } from "@homarr/db";
-import { groupMembers, groups, users } from "@homarr/db/schema/sqlite";
+import { and, createId, eq } from "@homarr/db";
+import { users } from "@homarr/db/schema/sqlite";
 import { logger } from "@homarr/log";
 import type { validation } from "@homarr/validation";
 import { z } from "@homarr/validation";
@@ -99,18 +99,6 @@ export const authorizeWithLdapCredentialsAsync = async (
       emailVerified: true,
       provider: true,
     },
-    with: {
-      groups: {
-        with: {
-          group: {
-            columns: {
-              id: true,
-              name: true,
-            },
-          },
-        },
-      },
-    },
     where: and(eq(users.email, mailResult.data), eq(users.provider, "ldap")),
   });
 
@@ -128,79 +116,16 @@ export const authorizeWithLdapCredentialsAsync = async (
 
     await db.insert(users).values(insertUser);
 
-    user = {
-      ...insertUser,
-      groups: [],
-    };
+    user = insertUser;
 
     logger.info(`User ${credentials.name} created successfully.`);
   }
 
-  if (user.name !== credentials.name) {
-    logger.warn(`User ${credentials.name} found in the database but with different name. Updating...`);
-
-    user.name = credentials.name;
-
-    await db.update(users).set({ name: user.name }).where(eq(users.id, user.id));
-
-    logger.info(`User ${credentials.name} updated successfully.`);
-  }
-
-  const ldapGroupsUserIsNotIn = userGroups.filter(
-    (group) => !user.groups.some((userGroup) => userGroup.group.name === group),
-  );
-
-  if (ldapGroupsUserIsNotIn.length > 0) {
-    logger.debug(
-      `Homarr does not have the user in certain groups. user=${user.name} count=${ldapGroupsUserIsNotIn.length}`,
-    );
-
-    const groupIds = await db.query.groups.findMany({
-      columns: {
-        id: true,
-      },
-      where: inArray(groups.name, ldapGroupsUserIsNotIn),
-    });
-
-    logger.debug(`Homarr has found groups in the database user is not in. user=${user.name} count=${groupIds.length}`);
-
-    if (groupIds.length > 0) {
-      await db.insert(groupMembers).values(
-        groupIds.map((group) => ({
-          userId: user.id,
-          groupId: group.id,
-        })),
-      );
-
-      logger.info(`Added user to groups successfully. user=${user.name} count=${groupIds.length}`);
-    } else {
-      logger.debug(`User is already in all groups of Homarr. user=${user.name}`);
-    }
-  }
-
-  const homarrGroupsUserIsNotIn = user.groups.filter((userGroup) => !userGroups.includes(userGroup.group.name));
-
-  if (homarrGroupsUserIsNotIn.length > 0) {
-    logger.debug(
-      `Homarr has the user in certain groups that LDAP does not have. user=${user.name} count=${homarrGroupsUserIsNotIn.length}`,
-    );
-
-    await db.delete(groupMembers).where(
-      and(
-        eq(groupMembers.userId, user.id),
-        inArray(
-          groupMembers.groupId,
-          homarrGroupsUserIsNotIn.map(({ groupId }) => groupId),
-        ),
-      ),
-    );
-
-    logger.info(`Removed user from groups successfully. user=${user.name} count=${homarrGroupsUserIsNotIn.length}`);
-  }
-
   return {
     id: user.id,
-    name: user.name,
+    name: credentials.name,
+    // Groups is used in events.ts to synchronize groups with external systems
+    groups: userGroups,
   };
 };
 
diff --git a/packages/auth/providers/credentials/credentials-provider.ts b/packages/auth/providers/credentials/credentials-provider.ts
index 7acda2749..571541b7a 100644
--- a/packages/auth/providers/credentials/credentials-provider.ts
+++ b/packages/auth/providers/credentials/credentials-provider.ts
@@ -10,30 +10,25 @@ type CredentialsConfiguration = Parameters<typeof Credentials>[0];
 
 export const createCredentialsConfiguration = (db: Database) =>
   ({
+    id: "credentials",
     type: "credentials",
     name: "Credentials",
-    credentials: {
-      name: {
-        label: "Username",
-        type: "text",
-      },
-      password: {
-        label: "Password",
-        type: "password",
-      },
-      isLdap: {
-        label: "LDAP",
-        type: "checkbox",
-      },
-    },
     // eslint-disable-next-line no-restricted-syntax
     async authorize(credentials) {
       const data = await validation.user.signIn.parseAsync(credentials);
 
-      if (data.credentialType === "ldap") {
-        return await authorizeWithLdapCredentialsAsync(db, data).catch(() => null);
-      }
-
       return await authorizeWithBasicCredentialsAsync(db, data);
     },
   }) satisfies CredentialsConfiguration;
+
+export const createLdapConfiguration = (db: Database) =>
+  ({
+    id: "ldap",
+    type: "credentials",
+    name: "Ldap",
+    // eslint-disable-next-line no-restricted-syntax
+    async authorize(credentials) {
+      const data = await validation.user.signIn.parseAsync(credentials);
+      return await authorizeWithLdapCredentialsAsync(db, data).catch(() => null);
+    },
+  }) satisfies CredentialsConfiguration;
diff --git a/packages/auth/providers/test/basic-authorization.spec.ts b/packages/auth/providers/test/basic-authorization.spec.ts
index ac070d024..b828d2784 100644
--- a/packages/auth/providers/test/basic-authorization.spec.ts
+++ b/packages/auth/providers/test/basic-authorization.spec.ts
@@ -25,7 +25,6 @@ describe("authorizeWithBasicCredentials", () => {
     const result = await authorizeWithBasicCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "basic",
     });
 
     // Assert
@@ -47,7 +46,6 @@ describe("authorizeWithBasicCredentials", () => {
     const result = await authorizeWithBasicCredentialsAsync(db, {
       name: "test",
       password: "wrong",
-      credentialType: "basic",
     });
 
     // Assert
@@ -69,7 +67,6 @@ describe("authorizeWithBasicCredentials", () => {
     const result = await authorizeWithBasicCredentialsAsync(db, {
       name: "wrong",
       password: "test",
-      credentialType: "basic",
     });
 
     // Assert
@@ -88,7 +85,6 @@ describe("authorizeWithBasicCredentials", () => {
     const result = await authorizeWithBasicCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "basic",
     });
 
     // Assert
diff --git a/packages/auth/providers/test/ldap-authorization.spec.ts b/packages/auth/providers/test/ldap-authorization.spec.ts
index 16f2fa697..c78fba30f 100644
--- a/packages/auth/providers/test/ldap-authorization.spec.ts
+++ b/packages/auth/providers/test/ldap-authorization.spec.ts
@@ -3,7 +3,7 @@ import { describe, expect, test, vi } from "vitest";
 
 import type { Database } from "@homarr/db";
 import { and, createId, eq } from "@homarr/db";
-import { groupMembers, groups, users } from "@homarr/db/schema/sqlite";
+import { groups, users } from "@homarr/db/schema/sqlite";
 import { createDb } from "@homarr/db/test";
 
 import { authorizeWithLdapCredentialsAsync } from "../credentials/authorization/ldap-authorization";
@@ -34,7 +34,6 @@ describe("authorizeWithLdapCredentials", () => {
       authorizeWithLdapCredentialsAsync(null as unknown as Database, {
         name: "test",
         password: "test",
-        credentialType: "ldap",
       });
 
     // Assert
@@ -57,7 +56,6 @@ describe("authorizeWithLdapCredentials", () => {
       authorizeWithLdapCredentialsAsync(null as unknown as Database, {
         name: "test",
         password: "test",
-        credentialType: "ldap",
       });
 
     // Assert
@@ -87,7 +85,6 @@ describe("authorizeWithLdapCredentials", () => {
       authorizeWithLdapCredentialsAsync(null as unknown as Database, {
         name: "test",
         password: "test",
-        credentialType: "ldap",
       });
 
     // Assert
@@ -120,7 +117,6 @@ describe("authorizeWithLdapCredentials", () => {
       authorizeWithLdapCredentialsAsync(null as unknown as Database, {
         name: "test",
         password: "test",
-        credentialType: "ldap",
       });
 
     // Assert
@@ -152,11 +148,11 @@ describe("authorizeWithLdapCredentials", () => {
     const result = await authorizeWithLdapCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "ldap",
     });
 
     // Assert
     expect(result.name).toBe("test");
+    expect(result.groups).toHaveLength(0); // Groups are needed in signIn events callback
     const dbUser = await db.query.users.findFirst({
       where: eq(users.name, "test"),
     });
@@ -197,11 +193,11 @@ describe("authorizeWithLdapCredentials", () => {
     const result = await authorizeWithLdapCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "ldap",
     });
 
     // Assert
     expect(result.name).toBe("test");
+    expect(result.groups).toHaveLength(0); // Groups are needed in signIn events callback
     const dbUser = await db.query.users.findFirst({
       where: and(eq(users.name, "test"), eq(users.provider, "ldap")),
     });
@@ -219,7 +215,8 @@ describe("authorizeWithLdapCredentials", () => {
     expect(credentialsUser?.id).not.toBe(result.id);
   });
 
-  test("should authorize user with correct credentials and update name", async () => {
+  // The name update occurs in the signIn event callback
+  test("should authorize user with correct credentials and return updated name", async () => {
     // Arrange
     const spy = vi.spyOn(ldapClient, "LdapClient");
     spy.mockImplementation(
@@ -251,11 +248,10 @@ describe("authorizeWithLdapCredentials", () => {
     const result = await authorizeWithLdapCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "ldap",
     });
 
     // Assert
-    expect(result).toEqual({ id: userId, name: "test" });
+    expect(result).toEqual({ id: userId, name: "test", groups: [] });
 
     const dbUser = await db.query.users.findFirst({
       where: eq(users.id, userId),
@@ -263,12 +259,12 @@ describe("authorizeWithLdapCredentials", () => {
 
     expect(dbUser).toBeDefined();
     expect(dbUser?.id).toBe(userId);
-    expect(dbUser?.name).toBe("test");
+    expect(dbUser?.name).toBe("test-old");
     expect(dbUser?.email).toBe("test@gmail.com");
     expect(dbUser?.provider).toBe("ldap");
   });
 
-  test("should authorize user with correct credentials and add him to the groups that he is in LDAP but not in Homar", async () => {
+  test("should authorize user with correct credentials and return his groups", async () => {
     // Arrange
     const spy = vi.spyOn(ldapClient, "LdapClient");
     spy.mockImplementation(
@@ -311,83 +307,9 @@ describe("authorizeWithLdapCredentials", () => {
     const result = await authorizeWithLdapCredentialsAsync(db, {
       name: "test",
       password: "test",
-      credentialType: "ldap",
     });
 
     // Assert
-    expect(result).toEqual({ id: userId, name: "test" });
-
-    const dbGroupMembers = await db.query.groupMembers.findMany();
-    expect(dbGroupMembers).toHaveLength(1);
-  });
-
-  test("should authorize user with correct credentials and remove him from groups he is in Homarr but not in LDAP", async () => {
-    // Arrange
-    const spy = vi.spyOn(ldapClient, "LdapClient");
-    spy.mockImplementation(
-      () =>
-        ({
-          bindAsync: vi.fn(() => Promise.resolve()),
-          searchAsync: vi.fn((argument: { options: { filter: string } }) =>
-            argument.options.filter.includes("group")
-              ? Promise.resolve([
-                  {
-                    cn: "homarr_example",
-                  },
-                ])
-              : Promise.resolve([
-                  {
-                    dn: "test55",
-                    mail: "test@gmail.com",
-                  },
-                ]),
-          ),
-          disconnectAsync: vi.fn(),
-        }) as unknown as ldapClient.LdapClient,
-    );
-    const db = createDb();
-    const userId = createId();
-    await db.insert(users).values({
-      id: userId,
-      name: "test",
-      email: "test@gmail.com",
-      provider: "ldap",
-    });
-
-    const groupIds = [createId(), createId()] as const;
-    await db.insert(groups).values([
-      {
-        id: groupIds[0],
-        name: "homarr_example",
-      },
-      {
-        id: groupIds[1],
-        name: "homarr_no_longer_member",
-      },
-    ]);
-    await db.insert(groupMembers).values([
-      {
-        userId,
-        groupId: groupIds[0],
-      },
-      {
-        userId,
-        groupId: groupIds[1],
-      },
-    ]);
-
-    // Act
-    const result = await authorizeWithLdapCredentialsAsync(db, {
-      name: "test",
-      password: "test",
-      credentialType: "ldap",
-    });
-
-    // Assert
-    expect(result).toEqual({ id: userId, name: "test" });
-
-    const dbGroupMembers = await db.query.groupMembers.findMany();
-    expect(dbGroupMembers).toHaveLength(1);
-    expect(dbGroupMembers[0]?.groupId).toBe(groupIds[0]);
+    expect(result).toEqual({ id: userId, name: "test", groups: ["homarr_example"] });
   });
 });
diff --git a/packages/auth/session.ts b/packages/auth/session.ts
index 5510ca89b..1bf9320d7 100644
--- a/packages/auth/session.ts
+++ b/packages/auth/session.ts
@@ -5,7 +5,8 @@ import type { Database } from "@homarr/db";
 
 import { getCurrentUserPermissionsAsync } from "./callbacks";
 
-export const sessionTokenCookieName = "next-auth.session-token";
+// Default of authjs
+export const sessionTokenCookieName = "authjs.session-token";
 
 export const expireDateAfter = (seconds: number) => {
   return new Date(Date.now() + seconds * 1000);
diff --git a/packages/auth/test/adapter.spec.ts b/packages/auth/test/adapter.spec.ts
new file mode 100644
index 000000000..7c74ffa4e
--- /dev/null
+++ b/packages/auth/test/adapter.spec.ts
@@ -0,0 +1,67 @@
+import { describe, expect, test } from "vitest";
+
+import { users } from "@homarr/db/schema/sqlite";
+import { createDb } from "@homarr/db/test";
+
+import { createAdapter } from "../adapter";
+
+describe("createAdapter should create drizzle adapter", () => {
+  test.each([["credentials" as const], ["ldap" as const], ["oidc" as const]])(
+    "createAdapter getUserByEmail should return user for provider %s when this provider provided",
+    async (provider) => {
+      // Arrange
+      const db = createDb();
+      const adapter = createAdapter(db, provider);
+      const email = "test@example.com";
+      await db.insert(users).values({ id: "1", name: "test", email, provider });
+
+      // Act
+      const user = await adapter.getUserByEmail?.(email);
+
+      // Assert
+      expect(user).toEqual({
+        id: "1",
+        name: "test",
+        email,
+        emailVerified: null,
+        image: null,
+      });
+    },
+  );
+
+  test.each([
+    ["credentials", ["ldap", "oidc"]],
+    ["ldap", ["credentials", "oidc"]],
+    ["oidc", ["credentials", "ldap"]],
+  ] as const)(
+    "createAdapter getUserByEmail should return null if only for other providers than %s exist",
+    async (requestedProvider, existingProviders) => {
+      // Arrange
+      const db = createDb();
+      const adapter = createAdapter(db, requestedProvider);
+      const email = "test@example.com";
+      for (const provider of existingProviders) {
+        await db.insert(users).values({ id: provider, name: `test-${provider}`, email, provider });
+      }
+
+      // Act
+      const user = await adapter.getUserByEmail?.(email);
+
+      // Assert
+      expect(user).toBeNull();
+    },
+  );
+
+  test("createAdapter getUserByEmail should throw error if provider is unknown", async () => {
+    // Arrange
+    const db = createDb();
+    const adapter = createAdapter(db, "unknown");
+    const email = "test@example.com";
+
+    // Act
+    const actAsync = async () => await adapter.getUserByEmail?.(email);
+
+    // Assert
+    await expect(actAsync()).rejects.toThrow("Unable to get user by email for unknown provider");
+  });
+});
diff --git a/packages/auth/test/callbacks.spec.ts b/packages/auth/test/callbacks.spec.ts
index b7002fb59..d2da21a3b 100644
--- a/packages/auth/test/callbacks.spec.ts
+++ b/packages/auth/test/callbacks.spec.ts
@@ -1,7 +1,5 @@
 /* eslint-disable @typescript-eslint/no-non-null-assertion */
-import { cookies } from "next/headers";
-import type { Adapter, AdapterUser } from "@auth/core/adapters";
-import type { Account } from "next-auth";
+import type { AdapterUser } from "@auth/core/adapters";
 import type { JWT } from "next-auth/jwt";
 import { describe, expect, test, vi } from "vitest";
 
@@ -9,7 +7,7 @@ import { groupMembers, groupPermissions, groups, users } from "@homarr/db/schema
 import { createDb } from "@homarr/db/test";
 import * as definitions from "@homarr/definitions";
 
-import { createSessionCallback, createSignInCallback, getCurrentUserPermissionsAsync } from "../callbacks";
+import { createSessionCallback, getCurrentUserPermissionsAsync } from "../callbacks";
 
 // This one is placed here because it's used in multiple tests and needs to be the same reference
 const setCookies = vi.fn();
@@ -141,151 +139,3 @@ describe("session callback", () => {
     expect(result.user!.name).toEqual(user.name);
   });
 });
-
-type AdapterSessionInput = Parameters<Exclude<Adapter["createSession"], undefined>>[0];
-
-const createAdapter = () => {
-  const result = {
-    createSession: (input: AdapterSessionInput) => input,
-  };
-
-  vi.spyOn(result, "createSession");
-  return result;
-};
-
-// eslint-disable-next-line @typescript-eslint/consistent-type-imports
-type SessionExport = typeof import("../session");
-const mockSessionToken = "e9ef3010-6981-4a81-b9d6-8495d09cf3b5";
-const mockSessionExpiry = new Date("2023-07-01");
-vi.mock("../env.mjs", () => {
-  return {
-    env: {
-      AUTH_SESSION_EXPIRY_TIME: 60 * 60 * 24 * 7,
-    },
-  };
-});
-vi.mock("../session", async (importOriginal) => {
-  const mod = await importOriginal<SessionExport>();
-
-  const generateSessionToken = (): typeof mockSessionToken => mockSessionToken;
-  const expireDateAfter = (_seconds: number) => mockSessionExpiry;
-
-  return {
-    ...mod,
-    generateSessionToken,
-    expireDateAfter,
-  } satisfies SessionExport;
-});
-
-describe("createSignInCallback", () => {
-  test("should return true if not credentials request and set colorScheme & sessionToken cookie", async () => {
-    // Arrange
-    const isCredentialsRequest = false;
-    const db = await prepareDbForSigninAsync("1");
-    const signInCallback = createSignInCallback(createAdapter(), db, isCredentialsRequest);
-
-    // Act
-    const result = await signInCallback({
-      user: { id: "1", emailVerified: new Date("2023-01-13") },
-      account: {} as Account,
-    });
-
-    // Assert
-    expect(result).toBe(true);
-  });
-
-  test("should return false if no adapter.createSession", async () => {
-    // Arrange
-    const isCredentialsRequest = true;
-    const db = await prepareDbForSigninAsync("1");
-    const signInCallback = createSignInCallback(
-      // https://github.com/nextauthjs/next-auth/issues/6106
-      { createSession: undefined } as unknown as Adapter,
-      db,
-      isCredentialsRequest,
-    );
-
-    // Act
-    const result = await signInCallback({
-      user: { id: "1", emailVerified: new Date("2023-01-13") },
-      account: {} as Account,
-    });
-
-    // Assert
-    expect(result).toBe(false);
-  });
-
-  test("should call adapter.createSession with correct input", async () => {
-    // Arrange
-    const adapter = createAdapter();
-    const isCredentialsRequest = true;
-    const db = await prepareDbForSigninAsync("1");
-    const signInCallback = createSignInCallback(adapter, db, isCredentialsRequest);
-    const user = { id: "1", emailVerified: new Date("2023-01-13") };
-    const account = {} as Account;
-    // Act
-    await signInCallback({ user, account });
-
-    // Assert
-    expect(adapter.createSession).toHaveBeenCalledWith({
-      sessionToken: mockSessionToken,
-      userId: user.id,
-      expires: mockSessionExpiry,
-    });
-    expect(cookies().set).toHaveBeenCalledWith("next-auth.session-token", mockSessionToken, {
-      path: "/",
-      expires: mockSessionExpiry,
-      httpOnly: true,
-      sameSite: "lax",
-      secure: true,
-    });
-  });
-
-  test("should set colorScheme from db as cookie", async () => {
-    // Arrange
-    const isCredentialsRequest = true;
-    const db = await prepareDbForSigninAsync("1");
-    const signInCallback = createSignInCallback(createAdapter(), db, isCredentialsRequest);
-
-    // Act
-    const result = await signInCallback({
-      user: { id: "1", emailVerified: new Date("2023-01-13") },
-      account: {} as Account,
-    });
-
-    // Assert
-    expect(result).toBe(true);
-    expect(cookies().set).toHaveBeenCalledWith(
-      "homarr-color-scheme",
-      "dark",
-      expect.objectContaining({
-        path: "/",
-      }),
-    );
-  });
-
-  test("should return false if user not found in db", async () => {
-    // Arrange
-    const isCredentialsRequest = true;
-    const db = await prepareDbForSigninAsync("other-id");
-    const signInCallback = createSignInCallback(createAdapter(), db, isCredentialsRequest);
-
-    // Act
-    const result = await signInCallback({
-      user: { id: "1", emailVerified: new Date("2023-01-13") },
-      account: {} as Account,
-    });
-
-    // Assert
-    expect(result).toBe(false);
-  });
-});
-
-const prepareDbForSigninAsync = async (userId: string) => {
-  const db = createDb();
-  await db.insert(users).values({
-    id: userId,
-    colorScheme: "dark",
-  });
-  return db;
-};
diff --git a/packages/auth/test/events.spec.ts b/packages/auth/test/events.spec.ts
new file mode 100644
index 000000000..02f44abd3
--- /dev/null
+++ b/packages/auth/test/events.spec.ts
@@ -0,0 +1,190 @@
+import type { ResponseCookie } from "next/dist/compiled/@edge-runtime/cookies";
+import type { ReadonlyRequestCookies } from "next/dist/server/web/spec-extension/adapters/request-cookies";
+import { cookies } from "next/headers";
+import { describe, expect, test, vi } from "vitest";
+
+import { eq } from "@homarr/db";
+import type { Database } from "@homarr/db";
+import { groupMembers, groups, users } from "@homarr/db/schema/sqlite";
+import { createDb } from "@homarr/db/test";
+
+import { createSignInEventHandler } from "../events";
+
+vi.mock("../env.mjs", () => {
+  return {
+    env: {
+      AUTH_OIDC_GROUPS_ATTRIBUTE: "someRandomGroupsKey",
+    },
+  };
+});
+// eslint-disable-next-line @typescript-eslint/consistent-type-imports
+type HeadersExport = typeof import("next/headers");
+vi.mock("next/headers", async (importOriginal) => {
+  const mod = await importOriginal<HeadersExport>();
+
+  const result = {
+    set: (name: string, value: string, options: Partial<ResponseCookie>) => options as ResponseCookie,
+  } as unknown as ReadonlyRequestCookies;
+
+  vi.spyOn(result, "set");
+
+  const cookies = () => result;
+
+  return { ...mod, cookies } satisfies HeadersExport;
+});
+
+describe("createSignInEventHandler should create signInEventHandler", () => {
+  describe("signInEventHandler should synchronize ldap groups", () => {
+    test("should add missing group membership", async () => {
+      // Arrange
+      const db = createDb();
+      await createUserAsync(db);
+      await createGroupAsync(db);
+      const eventHandler = createSignInEventHandler(db);
+
+      // Act
+      await eventHandler?.({
+        user: { id: "1", name: "test", groups: ["test"] } as never,
+        profile: undefined,
+        account: null,
+      });
+
+      // Assert
+      const dbGroupMembers = await db.query.groupMembers.findFirst({
+        where: eq(groupMembers.userId, "1"),
+      });
+      expect(dbGroupMembers?.groupId).toBe("1");
+    });
+    test("should remove group membership", async () => {
+      // Arrange
+      const db = createDb();
+      await createUserAsync(db);
+      await createGroupAsync(db);
+      await db.insert(groupMembers).values({
+        userId: "1",
+        groupId: "1",
+      });
+      const eventHandler = createSignInEventHandler(db);
+
+      // Act
+      await eventHandler?.({
+        user: { id: "1", name: "test", groups: [] } as never,
+        profile: undefined,
+        account: null,
+      });
+
+      // Assert
+      const dbGroupMembers = await db.query.groupMembers.findFirst({
+        where: eq(groupMembers.userId, "1"),
+      });
+      expect(dbGroupMembers).toBeUndefined();
+    });
+  });
+  describe("signInEventHandler should synchronize oidc groups", () => {
+    test("should add missing group membership", async () => {
+      // Arrange
+      const db = createDb();
+      await createUserAsync(db);
+      await createGroupAsync(db);
+      const eventHandler = createSignInEventHandler(db);
+
+      // Act
+      await eventHandler?.({
+        user: { id: "1", name: "test" },
+        profile: { preferred_username: "test", someRandomGroupsKey: ["test"] },
+        account: null,
+      });
+
+      // Assert
+      const dbGroupMembers = await db.query.groupMembers.findFirst({
+        where: eq(groupMembers.userId, "1"),
+      });
+      expect(dbGroupMembers?.groupId).toBe("1");
+    });
+    test("should remove group membership", async () => {
+      // Arrange
+      const db = createDb();
+      await createUserAsync(db);
+      await createGroupAsync(db);
+      await db.insert(groupMembers).values({
+        userId: "1",
+        groupId: "1",
+      });
+      const eventHandler = createSignInEventHandler(db);
+
+      // Act
+      await eventHandler?.({
+        user: { id: "1", name: "test" },
+        profile: { preferred_username: "test", someRandomGroupsKey: [] },
+        account: null,
+      });
+
+      // Assert
+      const dbGroupMembers = await db.query.groupMembers.findFirst({
+        where: eq(groupMembers.userId, "1"),
+      });
+      expect(dbGroupMembers).toBeUndefined();
+    });
+  });
+  test.each([
+    ["ldap" as const, { name: "test-new" }, undefined],
+    ["oidc" as const, { name: "test" }, { preferred_username: "test-new" }],
+    ["oidc" as const, { name: "test" }, { preferred_username: "test@example.com", name: "test-new" }],
+  ])("signInEventHandler should update username for %s provider", async (_provider, user, profile) => {
+    // Arrange
+    const db = createDb();
+    await createUserAsync(db);
+    const eventHandler = createSignInEventHandler(db);
+
+    // Act
+    await eventHandler?.({
+      user: { id: "1", ...user },
+      profile,
+      account: null,
+    });
+
+    // Assert
+    const dbUser = await db.query.users.findFirst({
+      where: eq(users.id, "1"),
+      columns: {
+        name: true,
+      },
+    });
+    expect(dbUser?.name).toBe("test-new");
+  });
+  test("signInEventHandler should set homarr-color-scheme cookie", async () => {
+    // Arrange
+    const db = createDb();
+    await createUserAsync(db);
+    const eventHandler = createSignInEventHandler(db);
+
+    // Act
+    await eventHandler?.({
+      user: { id: "1", name: "test" },
+      profile: undefined,
+      account: null,
+    });
+
+    // Assert
+    expect(cookies().set).toHaveBeenCalledWith(
+      "homarr-color-scheme",
+      "dark",
+      expect.objectContaining({
+        path: "/",
+      }),
+    );
+  });
+});
+
+const createUserAsync = async (db: Database) =>
+  await db.insert(users).values({
+    id: "1",
+    name: "test",
+    colorScheme: "dark",
+  });
+
+const createGroupAsync = async (db: Database) =>
+  await db.insert(groups).values({
+    id: "1",
+    name: "test",
+  });
diff --git a/packages/validation/src/user.ts b/packages/validation/src/user.ts
index 1057265cd..b611df5b2 100644
--- a/packages/validation/src/user.ts
+++ b/packages/validation/src/user.ts
@@ -56,7 +56,6 @@ const initUserSchema = createUserSchema;
 const signInSchema = z.object({
   name: z.string().min(1),
   password: z.string().min(1),
-  credentialType: z.enum(["basic", "ldap"]),
 });
 
 const registrationSchema = z
diff --git a/turbo.json b/turbo.json
index 67e69d087..d4eea04f3 100644
--- a/turbo.json
+++ b/turbo.json
@@ -18,6 +18,7 @@
     "AUTH_OIDC_CLIENT_SECRET",
     "AUTH_OIDC_ISSUER",
     "AUTH_OIDC_SCOPE_OVERWRITE",
+    "AUTH_OIDC_GROUPS_ATTRIBUTE",
     "AUTH_LDAP_USERNAME_ATTRIBUTE",
     "AUTH_LDAP_USER_MAIL_ATTRIBUTE",
     "AUTH_LDAP_USERNAME_FILTER_EXTRA_ARG",