A very basic APEX application showing how you can use a Passkey to Sign In to a APEX application.
Before you can use a Passkey you have to register it.
In this demo the Register page is not public, so to use it you first have to Sign In with one of the other two methods available in this App, probably the Open Door Method
Once Signed In you can "register" as Passkey for that User on your current device.
After registering you can use that stored Passkey to Sign In, if you are using that same device.