private async void Connect(object param)
        {
            try
            {
                IsConnecting = true;

                if (messenger.IsListening)
                {
                    messenger.StopListening();
                }

                messenger.Token = ConfigurationManager.AppSettings["telegramToken"];
                messenger.Proxy = GetProxy();
                messenger.OnMessageReceiving = ReceiveMessage;

                await messenger.StartListening();

                IsConnected = true;
            }
            catch (Exception)
            {
                IsConnected = false;
            }
            finally
            {
                IsConnecting = false;
            }
        }