post https://api.retailer.sbx.croissant.com/v0/credits//redeem
Post a store credit redemption. This resource will update the Croissant user's store credit balance for a given store credit ID (a value that uniquely identifies the credit in your system).
This resource is only necessary if you offer a store credit/gift card API directly on your platform. Merchants which handle store credit via manual issuance or by a third party need not integrate with this resource.