modify author.php

I would like to add some content form S2 custom fields in the author.php of my wordpress site.
I know how to call the regular fields (firstname, last name, etc) but How do I add other info, ike city, company, etc. I have these custom fields in S2.
This works for logged in users. It basically shows their info, but that is not what I need.
<?php echo get_user_field("city"); ?>
Any help is much appreciated!
I know how to call the regular fields (firstname, last name, etc) but How do I add other info, ike city, company, etc. I have these custom fields in S2.
This works for logged in users. It basically shows their info, but that is not what I need.
<?php echo get_user_field("city"); ?>
Any help is much appreciated!