Authentication flow is the first page under Users & auth → Sign-in. It shows your whole sign-in design on one screen and links to the detailed pages. Use it to understand what is currently on and to flip the common switches.
Authentication flow page with Registration, First factor and Second factor cards

Users & auth → Authentication flow: the whole sign-in journey on one page.

In Studio

The page has five cards.

Registration

Who may join, and what must happen before their first sign-in.

First factor

The ways a person proves who they are when they sign in.

Second factor

An extra step after the first factor. Two-step verification switches it on, and Requirement chooses who must use it. See Two-step verification.

Sessions

How long people stay signed in, and how many devices may stay active. Access token lifetime, Refresh token lifetime and Sessions per user. See Sessions.

Detailed controls

Shortcuts to Sign-up restrictions, Password policy and Attack protection.

Design your flow

A few combinations that work well:

Build your sign-in screen from the flow

Read what is on and show only those options:

Email and password

The first method to set up.

Configuring Auth

All settings in one table.