title: TwilioError: Participant disconnected because of duplicate identity
body: <p>In my application i need an ability for the user to dial-in into existing video room where he already has video track created under his identity, so whenever user calls i generate the following TwiML:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;Response&gt;  
     &lt;Connect&gt;  
        &lt;Room participantIdentity='MyIdentity'&gt;DailyStandup&lt;/Room&gt;  
     &lt;/Connect&gt; 
  &lt;/Response&gt; 
  </code></pre>
  
  <p>But since participant identity matches the one that is already connected to the room instead of adding audio track to the existing user i get an error:</p>
  
  <blockquote>
    <p>TwilioError: Participant disconnected because of duplicate identity</p>
  </blockquote>
  
  <p>Is there a way to merge video/audio channels into one participant by pure twiml without doing any complex mumbo-jumbo logical coding?</p>