implemented logout and rename login module to auth

scm-ui/src/components/PrimaryNavigation.js

@@ -1,15 +1,22 @@
 //@flow
 import React from "react";
 import PrimaryNavigationLink from "./PrimaryNavigationLink";
+import PrimaryNavigationAction from "./PrimaryNavigationAction";
 
-type Props = {};
+type Props = {
+  onLogout: () => void
+};
 
 class PrimaryNavigation extends React.Component<Props> {
   render() {
     return (
       <nav className="tabs is-boxed">
         <ul>
-          <PrimaryNavigationLink to="/users">Users</PrimaryNavigationLink>
+          <PrimaryNavigationLink to="/users" label="Users" />
+          <PrimaryNavigationAction
+            onClick={this.props.onLogout}
+            label="Logout"
+          />
         </ul>
       </nav>
     );