Wordpress creating request via $_SERVER['REQUEST_URI']?

Question

WordPress

Hello! I'm writing a personal account plugin, not a standard one, plus this is my first WP plugin, so I still don't know much.
The point is as follows: When registering in the database, together with the received data (login, password, etc.) I generate a link for this user - home_url( '/' ) . $login and put it in the database. It turns out something like mysite.ru/user777.
So, in the handler function, hung on the init hook, I set the condition:
if ( $_SERVER['REQUEST_URI'] === $user_profile_link ) include $profile_template;
During the transition, everything connects, but with a 404 error. Unless, of course, because the page does not find it. As I understand it, this is not good, I looked in the documentation and in general in the search for some kind of functions, but did not find anything. How can this be done correctly?

Answer 1

Do you generate your account page for each user?