title: How to access Google Spreadsheets with a service account credentials?
body: <p>I have created a server side application in PHP that's supposed to work with Google Spreadsheets.</p>
  
  <p>I'm able to authenticate successfully with OAuth 2.0 authentication, but when requesting the list of the spreadsheets from Google, I only get the spreadsheets shared with the service account by the spreadsheet owner.</p>
  
  <p>Is there a way that service account could retrieve all the spreadsheets owned by my main account not the service one, including those not explicitly shared with the service account?</p>
  
  <p>Also I still want to keep the spreadsheets private so noone can access them without my permission, but I need the service account to have full access to both existing and new spreadsheets.</p>
  
  <p>Any advice is appreciated.</p>