Add support for password-free authentication

[asnelling]

With CTAP2 and user verification, it should be possible to completely replace password-based authentication.

[Charles-Rocke]

Hi Addison, my name is Charles. This is a really cool project! I'm working on something similar with biometrics. I'd love to collaborate with you to build it out further. If you'd like, you can contact me at [email protected].
Thank you for your time