Protected ReadonlyargsOptionalmethodArgs: {OptionalmethodArgs: {When using the endpoint, the Store specified in the path and the Stores specified in the payload's stores field are added to the CartDiscount.
Creating a Cart Discount produces the [CartDiscountCreated](ctp:api:type:CartDiscountCreatedMessage) Message.
Checks if one or more CartDiscounts exist for the provided query predicate. Returns a
200status if any CartDiscounts match the query predicate, or a404status otherwise.