Anzu supports email as a built-in auth provider. You can simply enable email as an auth provider in the Anzu dashboard and users will be able to sign in with their email address.
The email auth provider will send a confirmation email on each auth attempt, including a magic link, which can be clicked to sign in on any device, without the need to enter a password. Alternatively, a code can be entered.
Emails are sent from auth@onanzu.com. Using a custom domain is not supported at the moment.
The appearance of auth emails depends on the hosted page appearance. You can customize the appearance of the hosted page in the Anzu dashboard.