Update oauth2_validators.py

Author: q0w

oauth2_provider/oauth2_validators.py

@@ -322,7 +322,7 @@ def invalidate_authorization_code(self, client_id, code, request, *args, **kwarg
 
         :raises: InvalidGrantError if the grant does not exist.
         """
-        deleted_grant_count = Grant.objects.filter(code=code, application=request.client).delete()
+        deleted_grant_count, _ = Grant.objects.filter(code=code, application=request.client).delete()
         if not deleted_grant_count:
             raise errors.InvalidGrantError(request=request)