title: Google API "games.players.get" returns 500
body: <p>I'm trying to get player info for authenticated user, it successful for the first request, but then fails later.</p>
  
  <pre><code>{
   "error": {
    "code": 500,
    "message": null
   }
  }
  </code></pre>
  
  <p>I already turning on OAuth 2.0, set the playerId to 'me', but it returns 500.
  Is there something wrong? Is there any limit requests for this one? Is anything missing?</p>
  
  <p>Thanks,</p>