Fix

src/Connect.php

@@ -139,7 +139,7 @@ class Connect
             'client_id' => config('bconnect.client_id'),
             'client_secret' => config('bconnect.client_secret'),
             'scope' => config('bconnect.user_scopes'),
-            'authorization_code' => $code
+            'code' => $code
         ], false);
 
         return $data;