NewChainVerifier creates a new Verifier that will return the first positive verification from the provided Verifiers.

ErrNotThisVerifier is returned when a verifier receives a token that is not intended for it.

ChainVerifier wraps multiple Verifiers; the first positive verification from any Verifier will be returned.

VerifyResult is the result of a successfully verified request.

Authenticator generates authentication credentials for requests.

Verifier verifies authentication credentials for requests.