Change wp-admin url

Hi all,

I have seen many tutorials on how to change wp-admin to any other link for security reasons.
But none of the given solutions are 100% working.

I was following this link:
https://ww.wp.xz.cn/support/topic/how-to-change-the-admin-url-or-wp-admin-to-secure-login?replies=13

What I want to do ?
– I want to change my wp-admin link to secret-link. To be more specific, change this link http://wordpress-site/wp-admin to http://wordpress-site/secret-link

And when anyone try to open http://wordpress-site/wp-admin or http://wordpress-site/wp-login.php he/she must be redirected to 404 Page.

What I’ve achieved so far ?
– Till now I am able to restrict http://wordpress-site/wp-admin
This link is redirecting to 404 Page.

Please help. Thanx.