Two-factor authentication (2FA) is an extra layer of security used when logging into websites or apps. With 2FA, you have to log in with your username and password and provide another form of authentication that only you know or have access to.| GitHub Docs
You may be prompted to register a passkey during sign-in, or you can choose to register a new passkey in your account settings. For 2FA users, you can upgrade existing eligible security keys into passkeys.| GitHub Docs
Detailed information about passkey support across devices and ecosystems| passkeys.dev