Access login.php under other URL

Hi,

I’m currently working on a member page on my website.

What I want to do is : Hide the default login/register/admin/forgotpassword URL and redirect them to 404 page.

I can do this editing my Htacess, no problem in it.

But now, I want to acess those pages from custom URL of my choice !

I would like to know which solution would be better to do it ! Every single plugin I found is outdated and I also would prefer to do it without plugin…

Thanks !