title: How to capture if a visitor is from a google adwords click
body: <p>When a user signs up on my site I want to be able to store whether or not they came to my site via an Adwords campaign. </p>
  
  <p>I know google uses javascript to track conversions based on a cookie that is created on the users machine. Is there a way I can check this cookie so I can store the source against the user account?</p>