Rewrite URL to remove "login=1"?

Hello

Using the code in the PunBB 1.3 integration article to use PunBB to authenticate users in a blog application, I notice that once authentication is successful, the URL includes a trailing "?login=1".

Is it possible to get rid of this directly? Otherwise, should I use URL Scheme for URL rewriting (I guess Nginx has an equivalent to Apache's mod_rewrite)?

Thank you.