final SearchLog searchLog = new SearchLog();

        if (fessConfig.isUserInfo()) {
            final String userCode = userInfoHelper.getUserCode();
            if (userCode != null) {
                searchLog.setUserSessionId(userCode);
                searchLog.setUserInfo(getUserInfo(userCode));
            }
        }

     *
     * @return the user code string, or null if no valid session exists
     */
    public String getUserCode() {
        return LaRequestUtil.getOptionalRequest().map(request -> {
            String userCode = (String) request.getAttribute(Constants.USER_CODE);
            if (StringUtil.isNotBlank(userCode)) {