Use this only if you previously created a Manuals+ passkey. If this is your first sign-in, choose Create a New Passkey; no existing passkey or other Manuals+ login is required.
Older two-factor/U2F-only security keys are not compatible. To create a passkey, use your phone or a FIDO2/passkey-capable security key.
Google One Tap may also appear when supported. Additional sign-in methods, including email-link login, are under Other.