public ActionResult AddToCart(LocationInventoryViewModel livm)
        {
            if (!ModelState.IsValid)
            {
                return(View("ShopView"));
            }
            var claimsIdentity = (ClaimsIdentity)User.Identity;

            if (claimsIdentity == null)
            {
                return(RedirectToAction("Index", "Home"));
            }
            var user = _logicClass.GetCurrentUser(claimsIdentity);
            List <LocationInventoryViewModel> livmList = _logicClass.DisplayLocationInventory(user);

            livmList = _logicClass.AddToCart(livmList, livm, user);
            return(RedirectToAction("Shop"));
        }