title: last_login_at not working (null) w/ Authlogic Magic Columns
body: <p>I am using the <a href="http://github.com/binarylogic/authlogic" rel="nofollow noreferrer">Authlogic</a>gem for authentication and most of it seems to be working great. Authlogic <a href="http://github.com/binarylogic/authlogic_example" rel="nofollow noreferrer">provides several columns</a> that you can add to your Users table (for example) that it knows to fill in if they are present. i.e. login_count, current_login_ip, last_request_at and last_login_at. </p>
  
  <p>All seem to be working fine with the exception of the last_login_at field which is null for each user. </p>
  
  <p>Is there anything specific that could be causing this perhaps having to do with the user sessions, etc? I can post code if needed but wasn't sure what would relate to this.</p>