public void SendWebhookMessage(string message, string username)
 {
     try
     {
         if (SlackWebhook.IsNotNullOrEmpty() && message.IsNotNullOrEmpty())
         {
             new Rest(SlackWebhook).PostAsync <string>("", new
             {
                 text     = message,
                 username = username.IsNullOrEmpty() ? $"MLEADER's Trading Bot [CEX.IO]" : username
             }).Wait();
         }
     }
     catch (Exception ex)
     {
         Rest.LogDebug(ex.StackTrace, ex);
     }
 }