private async void AddSubmissionExecute(object obj)
{
Submission.SubmissionID = Guid.NewGuid().ToString();
Submission.Recycler = RecyclerVM.Recycler.Username;
//Submission.Collector = Collector.Username;
Submission.Status = StatusInitial;
Submission.Material = Material.MaterialID;
Submission.MaterialName = Material.MaterialName;
Submission.SubmittedDate = SubmittedDate;
await SubmissionAuth.AddSubmission(Submission);
await Application.Current.MainPage.DisplayAlert("Success",
"You have successfully made an appointment with " + Submission.Collector, "OK");
await Application.Current.MainPage.Navigation.PopAsync();
}
