Configure a external FIDO server for  doing this webauthn registration & authentication

I have a separate FIDO server which provides all the APIs for FIDO (Webauthn) registration & authentication
How can I configure that separate FIDO server URL in openAM module or any other place for doing this registration & authentication ?
https://github.com/OpenIdentityPlatform/OpenAM/wiki/How-to-Setup-WebAuthn-Authentication-in-OpenAM 