Change “register” URL under login tab

Hello support
I have created a custom registration form for new users in a custom page.
But the button “register”, inside Login tab, redirects to:
https://mysite.com/wp-login.php?action=register

And I can’t find a way to point “Register” url to my custom url
e.g.: http://www.mysite.com/register

Is there a way I can change the url the link points to?