YubiKey
Chekc YubiKey by Yubico on online website.
Login with GDM
Edit file /etc/Yubico/u2f_keys_username
username:BASE64CODE:BASE64CODE,es256,+presence
Edit file /etc/pam.d/gdm-password
@include common-auth
auth [success=1 default=ignore] pam_u2f.so authfile=/etc/Yubico/u2f_keys_username cue
auth optional pam_gnome_keyring.so
@include common-account