public async Task App_Update_MainQueue(_Main_Queue mq)
        {
            string node = "Main_Queue/";

            try { await firebase.Child(node).Child(mq.Key).PutAsync <_Main_Queue>(mq); }
            catch (FirebaseException e) { Console.WriteLine("Problem -> Method: Update MainQueue"); throw; }
        }
 public async Task App_Insert_MainQueueAsync(_Main_Queue mq, bool Guest, CancellationToken cts)
 {
     try
     {
         cts.ThrowIfCancellationRequested();
         //Guest is True, Student is False
         if (Guest)
         {
             await Task.Run(() => firebase.Child("Main_Queue/").PostAsync <_Main_Queue>(mq));
         }
         else
         {
             await Task.Run(() => firebase.Child("Main_Queue/").Child(mq.Student_No).PutAsync <_Main_Queue>(mq));
         }
     }
     catch (FirebaseException e) { Console.WriteLine("Problem -> Method: Insert MainQueue"); throw; }
     catch (OperationCanceledException e) { Console.WriteLine("Cancelled -> Method: Insert MainQueue"); }
 }