Fixed locale when sending as a chat

classes/pyrogroup.py

@@ -117,6 +117,8 @@ class PyroGroup:
     def select_locale(
         self, app: PyroClient, user: User, ignore_auto: bool = False
     ) -> str:
+        if user is None:
+            return app.default_locale
         if not ignore_auto and self.locale_auto is True:
             if user.language_code is not None:
                 return user.language_code