title: Google+ API - get User ID by e-mail?
body: <p>It's just a few moments Google published its API for Google+ social network</p>
  
  <p>But how can I get numeric ID of user ? Or am I forced to use oAuth?</p>
  
  <p>I know it's written there in URL when you access your/foreign profile page, but how to do it programmaticaly with</p>
  
  <p><strong>info:</strong><br>
  <a href="http://developers.google.com/+/api/latest/people/get" rel="nofollow">http://developers.google.com/+/api/latest/people/get</a><br>
  <a href="http://developers.google.com/+/api/oauth" rel="nofollow">http://developers.google.com/+/api/oauth</a></p>