Optional verificationIdentifiers that require OTP verification before token issuance (e.g. ["email"]).
Absent when no verification is required. Collect OTP codes for each identifier
and pass them as verification to getTokenWithPasskey() — do NOT call
navigator.credentials.create() until all codes have been collected.
A passkey signup challenge ready for the WebAuthn ceremony.
publicKeyis decoded (base64url → ArrayBuffer) and can be fed directly into a WebAuthn credential creation ceremony.authSessionmust be retained and passed togetTokenWithPasskey().