This is the same flow your users get: create an account, sign back in, get a session. Nothing here is stored — it runs entirely in your browser.
The two calls behind it
POST https://seb-auth.lovable.app/api/public/v1/auth/signup
{ "email": "ada@example.com", "password": "s3cret-pass" }POST https://seb-auth.lovable.app/api/public/v1/auth/login
{ "email": "ada@example.com", "password": "s3cret-pass" }