Create Multiple Discount Codes Endpoint

Docs: https://shopify.dev/docs/api/admin-rest/2024-01/resources/discountcode#post-price-rules-price-rule-id-batch

This endpoint can be used to asynchronously create multiple discount codes in a single request on your Shopify store.

The price_rule_id path parameter is the ID of the price rule that the discount code will belong to. This is required because each discount code must belong to a price rule.