Webauthn, use finger print instead of login/password

Hi,

I work on a PWA project that would require to use fingerprint instead of login password (of course we will still need to login using login password a first time and then ask if the suer wants to use finger prints)

Any of you have ever tryed such a thing ?

I can manage to make multiple factor auth working with finger prints but no way to use it as “main auth”