diff --git a/auth_backend/auth_method/oauth.py b/auth_backend/auth_method/oauth.py
index 961e2767..216993d2 100644
--- a/auth_backend/auth_method/oauth.py
+++ b/auth_backend/auth_method/oauth.py
@@ -50,6 +50,7 @@ async def _unregister(cls, user_session: UserSession = Depends(UnionAuth(scopes=
         new_user = {"user_id": user_session.user.id}
         old_user_params = await cls._delete_auth_methods(user_session.user, db_session=db.session)
         old_user[cls.get_name()] = old_user_params
+        await cls._delete_userdata(user=user_session.user, db_session=db.session)
         await AuthPluginMeta.user_updated(new_user, old_user)
         return None
 
diff --git a/auth_backend/auth_method/userdata_mixin.py b/auth_backend/auth_method/userdata_mixin.py
index 871602af..0e28d689 100644
--- a/auth_backend/auth_method/userdata_mixin.py
+++ b/auth_backend/auth_method/userdata_mixin.py
@@ -38,3 +38,16 @@ def userdata_process_empty_strings(cls, userdata: UserLogin) -> UserLogin:
             if item.value == '':
                 item.value = None
         return userdata
+
+    @classmethod
+    @abstractmethod
+    async def _delete_userdata(cls, user: User, *, db_session: DbSession) -> None:
+        """Удаление  данных пользователя
+
+        Args:
+            user (User): Объект пользователя
+            db_session (DbSession): Сессия базы данных
+        Returns:
+            Ничего?
+        """
+        raise NotImplementedError()