title: How can i log out with AndroidAccountManager
body: <p>i can login with Android <code>AccountManager</code> with this code: 
  <a href="http://code.google.com/p/google-api-java-client/wiki/AndroidAccountManager" rel="nofollow">http://code.google.com/p/google-api-java-client/wiki/AndroidAccountManager</a></p>
  
  <p>But i don't know how to log out?</p>