@Override
        public AuthenticatedUser getAuthenticatedUser() throws AuthenticationException {
            logger.debug("getAuthenticatedUser called: " + saslServer.getAuthorizationID());
            return new AuthenticatedUser(saslServer.getAuthorizationID());
        }
Called once on server startup with the authentication.config from the *.yaml file
gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/auth/Krb5Authenticator.java