final FessConfig fessConfig = ComponentUtil.getFessConfig();
        if (authenticator != null && fessConfig.getSystemPropertyAsBoolean(SPNEGO_INITIALIZED, false)) {
            return authenticator;
        }
        try {
            // set some System properties
            final SpnegoFilterConfig config = SpnegoFilterConfig.getInstance(new SpengoConfig());

            // pre-authenticate

     */
    public static final String[] EMPTY_STRINGS = new String[0];

    static Object javaLangAccess = null;

    static Method newStringUnsafeMethod = null;

    static {
        try {
            final Class<?> sharedSecretsClass = Class.forName("sun.misc.SharedSecrets");
            javaLangAccess = sharedSecretsClass.getDeclaredMethod("getJavaLangAccess").invoke(null);

But then, when you open the integrated docs UI (the frontend), it would expect to get the OpenAPI schema at `/openapi.json`, instead of `/api/v1/openapi.json`.

So, the frontend (that runs in the browser) would try to reach `/openapi.json` and wouldn't be able to get the OpenAPI schema.

Because we have a proxy with a path prefix of `/api/v1` for our app, the frontend needs to fetch the OpenAPI schema at `/api/v1/openapi.json`.

        return AccessTokenDbm.getInstance();
    }

    @Override
    protected <RESULT extends AccessToken> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));

        return ElevateWordToLabelDbm.getInstance();
    }

    @Override
    protected <RESULT extends ElevateWordToLabel> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setElevateWordId(DfTypeUtil.toString(source.get("elevateWordId")));
            result.setLabelTypeId(DfTypeUtil.toString(source.get("labelTypeId")));

        return KeyMatchDbm.getInstance();
    }

    @Override
    protected <RESULT extends KeyMatch> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setBoost(DfTypeUtil.toFloat(source.get("boost")));
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

        return RelatedContentDbm.getInstance();
    }

    @Override
    protected <RESULT extends RelatedContent> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setContent(DfTypeUtil.toString(source.get("content")));
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

        return RelatedQueryDbm.getInstance();
    }

    @Override
    protected <RESULT extends RelatedQuery> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));

        if (boost != null) {
            return boost.toString();
        }
        return null;
    }

    public void setBoostValue(final String value) {
        if (value != null) {
            try {
                boost = Float.parseFloat(value);
            } catch (final Exception e) {}
        }
    }

    @Override
    public String getConfigId() {

        return FavoriteLogDbm.getInstance();
    }

    @Override
    protected <RESULT extends FavoriteLog> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedAt(toLocalDateTime(source.get("createdAt")));
            result.setDocId(DfTypeUtil.toString(source.get("docId")));