changeUserNameCard method
Implementation
Future<TUIActionCallback> changeUserNameCard(String userId, String nameCard) {
String userData = Tools.generateRoomUserData();
Completer<TUIActionCallback> completer = Completer();
_actionCallback2Future(userData, completer);
_engineSDK.Dart_ChangeUserNameCard(_engineFFIPointer, Tools.string2PointerChar(userId),
Tools.string2PointerChar(nameCard), Tools.string2PointerChar(userData));
return completer.future;
}