public async Task <IActionResult> OnPost()
        {
            if (!ModelState.IsValid)
            {   // var errors = ModelState.Values.SelectMany(v => v.Errors);
                Drinks = await drinks.GetAllDrinks();

                return(Page());
            }

            var badgeExists = await badge.Find(drinkOrder.BadgeSerial);

            if (badgeExists != null)
            {
                await AddOrder(badgeExists);
            }

            return(RedirectToPage("./Thanks"));
        }