public ActionResult <Item> UpdateItem(string cartId, string itemId, [FromBody] Item item)
{
try
{
item = store.UpdateItem(cartId, itemId, item.Product, item.Quantity);
return(Ok(item));
}
catch (ValidationException) { return(StatusCode(400)); }
catch (CartNotFoundException) { return(StatusCode(404)); }
catch (ItemNotFoundException) { return(StatusCode(404)); }
catch (Exception) { return(StatusCode(500)); }
}