title: What is the good way to get user_id from user home folder
body: <p>I'm making an "Author information" portlet showing information of a member when we are in user's home folder, ie: when the request url is <a href="http://.../Plone/Members/user1/" rel="nofollow">http://.../Plone/Members/user1/</a>*, the portlet needs to know user_id is user1.</p>
  
  <p>What is the good way to achieve this ?</p>