post
https://apis.kentro.live/store/v1/session.guest
Issues a guest token for an anonymous visitor. Store it with the visitor (a cookie your storefront owns) and send it as X-Storefront-Guest on every later call: it identifies the guest cart and a guest checkout, and at sign-in it lets the buyer choose between the guest cart and the account cart (cart.choices). The body is empty.
Who may call it: Anyone with the API key and the storefront host; no buyer or guest token is needed.
