code: protected void saveRememberMeKeyToCookie(USER_ENTITY userEntity, USER_BEAN userBean) {
          final int expireDays = getRememberMeAccessTokenExpireDays();
          getCookieRememberMeKey().ifPresent(cookieKey -> {
              doSaveRememberMeCookie(userEntity, userBean, expireDays, cookieKey);
          });
      }
docs: Save remember-me key to cookie.
  @param userEntity The selected entity of login user. (NotNull)
  @param userBean The user bean saved in session. (NotNull)