return processCallback(request, code);
                    }
                }
            }

            return new ActionResponseCredential(() -> HtmlResponse.fromRedirectPathAsIs(getAuthUrl(request)));
        }).orElse(null);
    }

    /**
     * Gets the authorization URL for OpenID Connect.
     *
     * @param request the HTTP servlet request
     * @return the authorization URL
     */

    /**
     * Deletes documents matching the specified search parameters.
     *
     * @param request The HTTP servlet request
     * @param params The search request parameters to identify documents to delete
     * @return Number of documents deleted
     */
    public long deleteByQuery(final HttpServletRequest request, final SearchRequestParams params) {

        }).orElse(null);
    }

    /**
     * Creates a login credential.
     * @param request The HTTP request.
     * @param response The HTTP response.
     * @param auth The SAML authentication.
     * @return The login credential.
     */
    protected LoginCredential createLoginCredential(final HttpServletRequest request, final HttpServletResponse response, final Auth auth) {

        try {
            final PutObjectRequest request =
                    PutObjectRequest.builder().bucket(bucket).key(objectName).contentType(contentType).contentLength(size).build();
            s3Client.putObject(request, RequestBody.fromInputStream(inputStream, size));
        } catch (final Exception e) {

     * @param request The HTTP servlet request containing authentication data.
     * @return The login credential or null if processing fails.
     */
    protected LoginCredential processAuthenticationData(final HttpServletRequest request) {
        final StringBuilder urlBuf = new StringBuilder(request.getRequestURL());
        final String queryStr = request.getQueryString();
        if (queryStr != null) {

    // ============================================================
    // Request and Field Constants
    // ============================================================

    /** Request attribute key for storing queries. */
    public static final String REQUEST_QUERIES = "fess.Queries";

    /** Request attribute key for storing highlight queries. */

    public String getUsername() {
        return getRequestManager().findUserBean(FessUserBean.class).map(FessUserBean::getUserId).orElse(Constants.GUEST_USER);
    }

    /**
     * Gets the request manager.
     *
     * @return The request manager.
     */
    protected RequestManager getRequestManager() {
        return ComponentUtil.getRequestManager();
    }

    /**
     * Gets the current time as a Date object.

    /** The key of the message: Request to OpenSearch */
    public static final String LABELS_sereq_configuration = "{labels.sereq_configuration}";

    /** The key of the message: Request File */
    public static final String LABELS_sereq_request_file = "{labels.sereq_request_file}";

    /** The key of the message: Request File */

     * Get the value for the key 'api.access.token.request.parameter'. <br>
     * The value is, e.g.  <br>
     * comment: API access token request parameter.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getApiAccessTokenRequestParameter();

    /**
     * Get the value for the key 'api.access.token.request.parameter' as {@link Integer}. <br>

     */
    @Size(max = 1000)
    public String defaultSortValue;

    /**
     * Virtual host configuration for multi-tenant setups.
     * Allows different search configurations based on the request host.
     */
    @Size(max = 10000)
    public String virtualHostValue;

    /**
     * Enable or disable appending query parameters to search URLs.