title: Google Oauth Login with omniauth-google-oauth2 failed frequently
body: <p>I'm using gem omniauth-google-oauth2 to login with google from Rails app.
  These days I'm getting this error:</p>
  
  <pre><code>{
   "error": {
    "errors": [
     {
      "domain": "usageLimits",
      "reason": "accessNotConfigured",
      "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
     }
    ],
    "code": 403,
    "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
   }
  }
  </code></pre>
  
  <p>Same settings would work fine for localhost, but failed frequently and sometime work on production. I have no idea of what's going on? Is Google changing there API recently? What API do I need to enable just to login and get user info?</p>