title: Google calendar API not working in signed apk
body: <p>I integrate Google Calendar api properly and also works fine in unsigned apk.
  But while i signed my app and try to access google calendar at that time api return below error.</p>
  
  <pre><code>Error com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden
                                                {
                                                  "code" : 403,
                                                  "errors" : [ {
                                                    "domain" : "usageLimits",
                                                    "message" : "Access Not Configured. The API (Calendar API) is not enabled for your project. Please use the Google Developers Console to update your configuration.",
                                                    "reason" : "accessNotConfigured",
                                                    "extendedHelp" : "https://console.developers.google.com"
                                                  } ],
                                                  "message" : "Access Not Configured. The API (Calendar API) is not enabled for your project. Please use the Google Developers Console to update your configuration."
                                                }
  </code></pre>
  
  <p>I also enabled Google Calendar api, CalDAV api.</p>
  
  <p>So, I face this only in signed apk. unsigned is work perfect.</p>
  
  <p>So, any one have idea that how i can resolve this issue? </p>