将启动页面设置为登录页面.

Set startup page as Login page..

当时的用户登录将用户ID设置为会话，并在会话中未找到用户ID时添加页面加载检查.可以将用户重定向到登录页面.

When user log-in at that time set user id into session, and add check on page load if userid is not found on to session, you can redirect user to login page.