Revnu Auth API
The authentication API behind the @revnu/auth SDK, serving a Revnu store's buyers. Purchase-first — buying a product creates the account and sends a password setup link, so there is no separate sign-up flow. Identified by a publishable store key in the X-Revnu-Key header, and issuing RS256 JWTs whose claims embed the buyer's product entitlements, so access checks need no webhook and no callback.