To decode the AuthenticatorAttestationResponse: attestationObject property returned when attestationType: 'direct' is passed to .create(), this works:

const {decodeAllSync} = require("cbor");

// ...

const att1 = decodeAllSync(credential.response?.attestationObject, {required: true, encoding: 'base64url'})[0]

However, when I do the same for the authenticatorData

const data = decodeAllSync(credential.response?.authenticatorData, {required: true, encoding: 'base64url'})[0];

I get this error, whatever platform created the credential:

TypeError The encoded data was not valid for encoding utf-8 ERR_ENCODING_INVALID_ENCODED_DATA

I’m using Node 18, if that matters.

How should I go about decoding ‘.authenticatorData’ ?