DocsAccount and Billing
Two-Step Sign-In
Authenticator apps and recovery codes.
Every account signs in with an email code and an authenticator app.
Change your authenticator
Your Profile › Two-Step Sign-In › Change. Enter a code from your current app, scan the new QR code, then confirm. Your other devices are signed out.
Recovery codes
Get ten one-time codes under Your Profile. Each works once in place of your app's code. Keep them somewhere safe.