plugin can be overcome

this plugin can be overcome when you go to /wp-admin/customize.php
so the idea hide regular login page is not working

second bug, when you’re already logged in, and you go to the login page, you are asked for password again, correct behaviour is: if I’m already logged in, and go to login page I should be redirected to wp-admin page.

I recommend you plugin All In One WP Security, where both issued are solved.