Problem with renaming login page and logged-in users

Hi guys.
I have renamed my login page in aiowps to something like this https://www.foo.com/abcd.
everything is fine. the only problem is that if a logged-in user types that url (www.foo.com/abcd), they can access to login page again, and can enter their username and password but this time with wp recaptcha integration plugin disabled. how can i disable access to login page after the user logs in?
thanks

https://www.ads-software.com/plugins/all-in-one-wp-security-and-firewall/