diff --git a/src/Controllers/OAuthController.php b/src/Controllers/OAuthController.php
index 94d454f..1c81fbf 100644
--- a/src/Controllers/OAuthController.php
+++ b/src/Controllers/OAuthController.php
@@ -111,7 +111,7 @@ public function callBack(): RedirectResponse
             $users->addToDefaultGroup($user);
         }
 
-        if ($this->userExist->isBanned()) {
+        if ($this->userExist && $this->userExist->isBanned()) {
             return redirect()->to(config('Auth')->logoutRedirect())->with('error', $this->userExist->getBanMessage() ?? lang('Auth.bannedUser'));
         }