chore: Add language to OwnUser

packages/stream_chat_flutter/example/lib/main.dart

@@ -24,11 +24,15 @@ void main() async {
   /// Please see the following for more information:
   /// https://getstream.io/chat/docs/ios_user_setup_and_tokens/
   await client.connectUser(
-    User(id: 'super-band-9'),
+    User(id: 'super-band-9', language: 'fr'),
     'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoic3VwZXItYmFuZC05In0.'
     '0L6lGoeLwkz0aZRUcpZKsvaXtNEDHBcezVTZ0oPq40A',
   );
 
+  client.on().listen((e) {
+    print('e.user.language ${e.me?.language}');
+  });
+
   final channel = client.channel('messaging', id: 'godevs');
 
   await channel.watch();