title: Parse Webhook: Get Data Appended to Webhook URL
body: <p>I'm doing OAuth2 to integrate Square and my app which uses Parse as its backend.  </p>
  
  <p>My issue is that when Square calls the redirect uri, it directs the user to a subdomain I created in Parse with the authorization code appended to the subdomain uri.  <strong>I need to extract this authorization code from the uri, but do not know how.</strong>  Parse Cloud Code is needed to do this.  </p>
  
  <p>I believe I need to create a Webhook URL in Cloud Code and then extract the data appended to the URL, the base of which is the subdomain URL.  Steps outlining the process, code examples and links to helpful documentation would be much appreciated.  </p>
  
  <p>Furthermore, once I figure this out, I need to have my web browser jump the user back to the app that brought up Square initially once this redirect URL is called.  Not sure how to do this and haven't found things that make sense.  Tips, recommendations and links would be appreciated! </p>
  
  <p>Thanks!</p>