title: Is there any way to send data to pusher channel_auth_endpoint?
body: <p>I´m developing a chat with pusher and i need to send some data to the auth endpoint, is there any way to send data and access it via POST or GET ?</p>
  
  <pre><code>  Pusher.channel_auth_endpoint = '/server/client_auth';
    pusher = new Pusher('public_key');
  </code></pre>
  
  <p>Thanks!!!</p>