private static void SendMessageToSlack(string messageText)
    {
        messageText = string.Format("{0} - {1}/ServiceStatus.aspx", messageText, SystemSettings.GetAppUrl());
        try
        {
            SlackMessage message = new SlackMessage(LoginUser.Anonymous);
            message.TextPlain = messageText;
            message.TextRich  = messageText;
            message.Color     = "#D00000";

            // send to channel
            message.Send("#service-warnings");
        }
        catch (Exception ex)
        {
        }
    }