You will interact with the authenticators through an HTML page and Javascript using the Webauthn API.
We highly recommend the use of @simplewebauthn/browser. This library provides lots of easy and useful features and it fully compliant with the specification.
If you use the Symfony UX, you may be interested in the Stimulus Controller.
{% hint style="danger" %}
Note that is mandatory to use the HTTPS scheme to use Webauthn otherwise it will not work. This is also mandatory for localhost.
{% endhint %}