_init_users on UserService was missing an await

ielts_be/services/impl/user.py

@@ -35,7 +35,7 @@ class UserService(IUserService):
         self._db = document_store
         self._logger = getLogger(__name__)
 
-    def batch_users(self, batch_dto: BatchUsersDTO):
+    async def batch_users(self, batch_dto: BatchUsersDTO):
         file_name = f'{uuid.uuid4()}.csv'
         path = f'./tmp/{file_name}'
         self._generate_firebase_auth_csv(batch_dto, path)
@@ -46,7 +46,7 @@ class UserService(IUserService):
             self._logger.error(error_msg)
             return error_msg
 
-        self._init_users(batch_dto)
+        await self._init_users(batch_dto)
 
         FileHelper.remove_file(path)
         return {"ok": True}