protected void validateNonce(final StateData stateData, final IAuthenticationResult authData) {
        final String idToken = authData.idToken();
        if (logger.isDebugEnabled()) {
            logger.debug("idToken={}", idToken);
        }
        try {
            final JWTClaimsSet claimsSet = JWTParser.parse(idToken).getJWTClaimsSet();
            if (claimsSet == null) {