inviteInGroup method 
    
    
    
  Implementation
  Future<V2TimValueCallback<String>> inviteInGroup({
  required String groupID,
  required List<String> inviteeList,
  required String data,
  int timeout = 30,
  bool onlineUserOnly = false,
}) async {
  if (kIsWeb) {
    return TencentCloudChatSdkPlatform.instance.inviteInGroup(
        groupID: groupID,
        inviteeList: inviteeList,
        data: data,
        timeout: timeout,
        onlineUserOnly: onlineUserOnly);
  }
  return TIMSignalingManager.instance.inviteInGroup(
      groupID: groupID,
      inviteeList: inviteeList,
      data: data,
      timeout: timeout,
      onlineUserOnly: onlineUserOnly);
}