/** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_DEFAULT_DISPLAY_PERMISSIONS = "role.search.default.display.permissions";

    /** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_GUEST_PERMISSIONS = "role.search.guest.permissions";

    /** The key of the configuration. e.g. 1 */

                logger.warn("Failed to process shutdown task.", e);
            }
        });
    }

    /**
     * Gets the username of the current user.
     *
     * @return The username, or "guest" if not logged in.
     */
    public String getUsername() {
        return getRequestManager().findUserBean(FessUserBean.class).map(FessUserBean::getUserId).orElse(Constants.GUEST_USER);
    }

    /**