1. Pick your auth mode
Embedded auth uses the customer auth API directly for password, register, magic-link, phone OTP, and email verification flows. Hosted auth uses OIDC discovery plus an Authorization Code + PKCE redirect flow.
Hosted client id: client-9a6e7dbf0e89434c82d248c31bb637d4
Hosted redirect URI: https://sandbox.demo.uselamba.com/api/auth/hosted/callback
Social and branded sign-in tests should use the hosted flow.