presto-client/src/main/java/io/prestosql/client/SpnegoHandler.java/SpnegoHandler/Session
class SpnegoHandler:        public Session(LoginContext loginContext, GSSCredential clientCredential)
        {
            requireNonNull(loginContext, "loginContext is null");
            requireNonNull(clientCredential, "gssCredential is null");

            this.loginContext = loginContext;
            this.clientCredential = clientCredential;
        }