Fix a url

src/app/user.service.ts

@@ -127,7 +127,7 @@ export class UserService {
 
   public login(idp: IdP) {
     this.setIdPPreference(idp);
-    window.location.href = 'https://hdf-portal.data.kit.edu/backend/auth/v1/request';
+    window.location.href = 'https://hdf-portal.data.kit.edu/backend/auth/v1/request/';
   }
 
   public logout() {