[Plugin: Co-Authors Plus] Custom Author Information

I have been trying to create author pages as described in the codex: http://codex.ww.wp.xz.cn/Author_Templates None of the information seems to be getting pulled, is there something I need to change? A specific example is using this:

<br />
<?php<br />
$curauth = (isset($_GET['author_name'])) ? get_user_by('slug', $author_name) : get_userdata(intval($author)); /?></p>
<p><?php echo $curauth->nickname;?><br />

http://ww.wp.xz.cn/extend/plugins/co-authors-plus/