Apply scala.util.control.Exception to exception handling.

src/main/scala/util/Keys.scala

@@ -13,12 +13,7 @@ object Keys {
     /**
      * Session key for the logged in account information.
      */
-    val LoginAccount = "LOGIN_ACCOUNT"
-
-    /**
-     * Session key for the redirect URL.
-     */
-    val Redirect = "REDIRECT"
+    val LoginAccount = "loginAccount"
 
     /**
      * Session key for the issue search condition in dashboard.
@@ -47,6 +42,20 @@ object Keys {
 
   }
 
+  object Flash {
+
+    /**
+     * Flash key for the redirect URL.
+     */
+    val Redirect = "redirect"
+
+    /**
+     * Flash key for the information message.
+     */
+    val Info = "info"
+
+  }
+
   /**
    * Define request keys.
    */