public static TelegramManager GetInstance()
 {
     if (manager == null)
     {
         manager = new TelegramManager();
     }
     return(manager);
 }
        public void Notify(Event calendarEvent)
        {
            var telegram = TelegramManager.GetInstance();

            if (telegram.isLogin)
            {
                telegram.SendMessage(calendarEvent.NotificationMessage);
            }
        }