title: best codeigniter 2.1 authentication library with social networking site integration
body: <p>What's the best codeigniter authentication library out there that supports social networking integration such as <code>facebook, twitter, linkedin, google+</code> etc? </p>
  
  <p>Currently I'm learning a3m which is ok, but I'm having some troubles integrating it to twitter because they have updated their API. </p>
  
  <p>I found tank while googling around but I haven't tried it yet. I found some other authentication library but they lack documentation which I'm having a hard time learning. Any help would be much appreciated.</p>