title: Google Identity Toolkit returns CONFIGURATION_NOT_FOUND
body: <p>I'm trying to Build Google+ Sign In On Android Device using Google Identity Toolkit , I followed the Quick Start Guide on <a href="https://developers.google.com/identity/toolkit/android/" rel="noreferrer">https://developers.google.com/identity/toolkit/android/</a> , but I'm repeatedly getting the following error.</p>
  
  <p><code>"error": {
  "errors": [
  {
  "domain": "global",
  "reason": "invalid",
  "message": "CONFIGURATION_NOT_FOUND"
  }
  ],
  "code": 400,
  "message": "CONFIGURATION_NOT_FOUND"
  }
  }</code></p>
  
  <p>Anyone can help me?</p>