title: Google drive v3 java API to get quota for service account
body: <p>I want to get the quota of Google drive using V3 java API. </p>
  
  <pre><code>Drive driveService = getDriveService();
  
  driveService.about().get()
  
  return {}
  </code></pre>
  
  <p>I am getting the driveService using a service account. Can anybody suggest what am I missing?</p>
  
  <p>Does the service account share the storage quota of the parent gmail account?</p>