title: Wordpress plugin to save referrer on signup
body: <p>On a wordpress blog I set up soocial login with hybridauth.</p>
  
  <p>Now I want to track and save the Referrer to my database.</p>
  
  <p>Is there a Wordpress plugin exisiting that does it or could an exisiting plugin be modified?</p>
  
  <p>Referrer is not saved to one those tables</p>
  
  <pre><code>wp_usermeta
  wp_users
  </code></pre>
  
  <p>Many Thanks</p>