title: AuthenticationToken is null
body: <p>I'm currently writing a C# metro app for the Windows 8 consumer preview which fetches some data from my REST-based web services. I want the app to authenticate against the services using the Windows Live account of the current user. Therefore, I added the Windows Live SDK to my solution and pasted the following snippet from the documentation into my login view:</p>
  
  <pre><code>LiveAuthClient liveClient = new LiveAuthClient();                
  LiveLoginResult loginResult = await liveClient.Login(new string[] { "wl.signin" });
  </code></pre>
  
  <p>After the login call has succeeded, I want to pass the encrypted <code>AuthenticationToken</code> of the <code>LiveConnectSession</code> via SSL to my webservice which should decrypt the token and read the information it is interested in (that's what the documentation suggests for such a SSO scenario). But sadly, the <code>AuthenticationToken</code> property of the session is always <code>null</code>. Am I missing something here?</p>