/** HTTP transport for OpenID Connect requests. */
    protected final HttpTransport httpTransport = new NetHttpTransport();

    /** JSON factory for OpenID Connect response parsing. */
    protected final JsonFactory jsonFactory = GsonFactory.getDefaultInstance();

    /**
     * Initializes the OpenID Connect authenticator.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

                        // quote fields starting with $
                        .replaceAll(/(\$[^ ,\n}]+)\s*:/, '"$1":')

                    JsonFactory jf = new JsonFactory();
                    jf.configure(JsonParser.Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER,true);
                    JsonParser jsonParser;

                    try {