挑选折扣客户-DiscountCustomerSelection union

选择可以使用此折扣的客户。

可能的类型

• [DiscountCustomerAll](https://shopify.dev/docs/admin-api/graphql/reference/discounts-and-marketing/discountcustomerall)
• [DiscountCustomerSavedSearches](https://shopify.dev/docs/admin-api/graphql/reference/discounts-and-marketing/discountcustomersavedsearches)
• [DiscountCustomers](https://shopify.dev/docs/admin-api/graphql/reference/discounts-and-marketing/discountcustomers)