private async void BuyItem_Clicked(object sender, EventArgs e)
 {
     try
     {
         var email = new EmailMessage
         {
             Subject = await viewModel.GetEmailSubject(),
             To      = await viewModel.GetEmailRecipients(),
             Body    = await viewModel.CreateBuyItemsEmail(),
         };
         await Email.ComposeAsync(email);
     }
     catch (Exception exc)
     {
         Debug.WriteLine("Exception while buy items");
         Debug.WriteLine(exc.ToString());
         await DisplayAlert("Error while buy items", exc.ToString(), "ok");
     }
 }