Architect layer
Sign-in
How a person gets into this project: which doors are open, who opens them, and what each door needs in order to work.
Resend provider
A sign-in link sent by email: the key and the address the letter comes from.
Sign-in link by email
not setGet an API key at resend.com and use a From address on a domain you verified there.
Both need a custom domain with HTTPS: Google requires an HTTPS redirect address, and an email link needs a real sending domain. Attach a domain in the control panel first — until then these fields are read-only.