Add Member

This method assigns a loyalty card to a customer. It selects a <!-- [loyalty card](OpenAPI.json/components/schemas/Voucher) -->[loyalty card](ref:get-voucher) suitable for publication, adds a publish entry, and returns the published voucher. A voucher is suitable for publication when it's active and hasn't been published yet. <!-- theme: info --> > 📘 Auto-update campaign > > In case you want to ensure the number of publishable codes increases automatically with the number of customers, you should use **auto-update** campaign.