public ActionResult Delete(
            [Bind("UserId, IngredientId")] UserFavouriteIngredient userFavouriteIngredient,
            int?pageNumber)
        {
            _context.Remove(userFavouriteIngredient);
            _context.SaveChanges();

            return(RedirectToAction("Index", "ConfigurationIngredients", new { pageNumber }));
        }
        public ActionResult Store(
            [Bind("UserId, IngredientId")] UserFavouriteIngredient userFavouriteIngredient,
            int?pageNumber)
        {
            var isAUnwantedIngredient =
                _context.UserUnwantedIngredients.Find
                    (userFavouriteIngredient.UserId, userFavouriteIngredient.IngredientId) != null;

            if (!isAUnwantedIngredient)
            {
                _context.Add(userFavouriteIngredient);
                _context.SaveChanges();
            }

            return(RedirectToAction("Index", "ConfigurationIngredients", new { pageNumber }));
        }