If you have troubles during the development of your application or if you want to keep track of every critical/error messages in production, you can use a PSR-3 compatible logger.
The following classes have an optional constructor parameter $logger
that can accept the logging service.
Webauthn\AttestationStatement\AttestationObjectLoader
Webauthn\AuthenticatorAssertionResponseValidator
Webauthn\AuthenticatorAttestationResponseValidator
Webauthn\PublicKeyCredentialLoader
Webauthn\Counter\ThrowExceptionIfInvalid