title: Short functions from a Codeigniter's library
body: <p>I got a Tank Auth library installed in my Codeigniter package, the problem is that I don't like how to <code>is_logged_in</code> functions need to be called because it's simply long and not so friendly, as I need to use:</p>
  
  <p><code>$this-&gt;tank_auth-&gt;is_logged_in()</code></p>
  
  <p>Everytime I want to check if user is logged in...
  So is there a way to make it shorter? By saying shorter I mean something like <code>$this-&gt;logged();</code>?</p>
  
  <p>I would really appreciate if someone could help me.</p>
  
  <p>Thank you.</p>