Passwordless login without having to type username

[tushev]

Hello,

Currently login with WebAuthn requires typing your username.
It's not always convenient.

It would be nice to have an option to authenticate using a passkey without having to type your username.
Obviously, the passkey must require user verification/PIN to be used in such way.

Thanks!

[tushev]

See also #41599 (comment)

[MrRinkana]

I second this, residential keys as default is how it should be done, with 2fa bypassed if such a key is used (see #21215).

This gives combined first and second factor, with a very nice login-flow, especially considering the combined 2fa.

Non-residential keys are nice, but the login flow is not the best since you still have to enter your username.
Non-residential without pin should be disabled unless explicitly enabled trough a warning (unless the key is used for 2fa only).