custom login link redirect to previous page

add_filter("wpdiscuz_login_link", function ($login) {
    return '<a href="https://xyz/amember/login">Login</a>';
});

I have used above filter but how to redirect to previous page from where user clicked on login link.
default login link when i do mouse hover it look like this.

https://www.xyz.com/?login1&redirect=https://www.xyz.com/

Thanks