
Currently, fingerprint authentication is always a secondary thing. If a user wants to swipe their finger when the computer is asking for a password, so be it. This commit paves the way for making fingerprint auth optionally be the main way to authenticate. Currently there's no way to enable this, but in a future commit will honor enable-password-authentication=false in gsettings. https://bugzilla.gnome.org/show_bug.cgi?id=683437