bug correction with id

src/Application/Actions/Group/AddUserGroupAction.php

@@ -22,7 +22,7 @@ class AddUserGroupAction extends GroupAction
         }
     
         $currentUser = $this->userRepository->find($_SESSION['userId']);
-        if ($this->group->hasUser($currentUser)){
+        if ($group->hasUser($_SESSION['userId'])){
             return $this->response
             ->withHeader('Location', '/groups/' . $groupId)
             ->withStatus(302);