title: Update yammer group from public to private via API
body: <p>Is it possible to: </p>
  
  <p>Update yammer group from public to private via API?</p>
  
  <p>I am trying to do something like this:
  <a href="https://www.yammer.com/networkname/groupID.json?id=groupID&amp;private=true&amp;authenticity_token=token" rel="nofollow">https://www.yammer.com/networkname/groupID.json?id=groupID&amp;private=true&amp;authenticity_token=token</a></p>