Implementation of IAccessTokenProvider to use to get the token for requests authentication. Optional.

Implementation of ICardCrypto interface.

Implementation of ICardVerifier interface to be used to verify the validity of Virgil Cards received from network and via CardManager.importCard method.

Alters the behavior of the CardManager when it receives an HTTP Unauthorized (401) error from the server. If this is set to true it will silently request a new token form the CardManager.accessTokenProvider and re-send the request, otherwise the error will be returned to the client.

Optional ISignCallback.