How to redirect from Private Page to Login Form

Hi.

I am looking for this topic on the web, but I don’t find the exact reply.

I have a public website, but I want to have a private page only accessible for register users. So, I want to have a public link (visible to everyone) to this private page (https://domain.com/members/). If the user is not previously logged-in, it’s redirected to login page. If the user is previously logged-in, it’s not redirected to login page.

Could you help me with this, please?

Thank you very much. Regards.