private async void serveCoffe()
{
SelectedDrink.SugarQty = SugarQty;
Drink drink = SelectedDrink.GetDrinkFromModel();
await this.dataService.SaveLastUserDrinkAsync(drink, CurrentUser.UsrID);
IsGoodByeVisible = true;
await Task.Delay(10000);
IsGoodByeVisible = false;
navService.NavigateTo(ViewModelLocator.LOGIN_VIEW);
}
