This is a great, highly accessible guide. The biggest value add is in the description of the protocol, although the W3C standard (https://www.w3.org/TR/webauthn

This is a great, highly accessible guide. The biggest value add is in the description of the protocol, although the W3C standard (https://www.w3.org/TR/webauthn/ https://www.w3.org/TR/webauthn/) was also expertly written and is a great, relatively accessible resource. Duo has done good work in this space. I've written an implementation of WebAuthn for Python-based webapps: https://github.com/pyauth/pywarp https://github.com/pyauth/pywarp that may be useful to implementers.