FIX #22648 TIME 0:30 fix guard with authenticationInformations

(cherry picked from commit cf4878e0)

src/frontend/app/service/auth.guard.ts

@@ -28,13 +28,13 @@ export class AuthGuard implements CanActivate {
         public dialog: MatDialog,
         private menu: MenuController) { }
 
-    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {
+    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<any> | boolean {
         if (route.url.join('/') === 'login') {
             if (this.authService.isAuth()) {
                 this.router.navigate(['/home']);
                 return false;
             } else {
-                this.http.get('../rest/authenticationInformations').pipe(
+                return this.http.get('../rest/authenticationInformations').pipe(
                     map((data: any) => {
                         this.authService.loginMessage = data.loginMessage;
                         this.authService.authMode = data.connection;
@@ -42,9 +42,9 @@ export class AuthGuard implements CanActivate {
                         this.authService.coreUrl = data.coreUrl;
                         this.authService.mailServerOnline = data.mailServerOnline;
                         this.localStorage.setAppSession(data.instanceId);
+                        return true;
                     })
-                ). subscribe();
-                return true;
+                );
             }
         } else if (!this.authService.authFailed) {
             this.menu.enable(true, 'left-menu');