Update Shopping List
update a shopping list detail. you can also update shopping list items by update the items field by this API endpoints.
note:
1. User id for update the shopping list is not required. You can optionally enter this field according to whether you need to judge user permissions.
2. The ID field in shopping list items is an optional field. If it is null, you can only change the quantity of this item by product ID, variant ID and option list, these three fields will determine an actual item. If it is not null, the ID field will determine an actual item and you can change product ID, variant ID, and option list by this way.
3. Set a zero quantity of shopping list item will delete this item.
4. Quantity = 0 will remove item, you can modify multiple items at one time.