title: How to create Google calendar entry w/o user?
body: <p>Recently I've decided to give users at my site the following functionality: online time slot booking in calendars of my employees. All employees have Google accounts linked to our domain in Google Apps (free edition). Users make booking in some front-end (e.g. not directly in employees Google calendars), then request is processed at our PHP server and if it is correct, server should be able to create new calendar entry in selected employee Google calendar. Note - neither user, nor employee should not be asked for authentication during booking.</p>
  
  <p>I've scanned Google calendar v3 API and forums and still didn't get neither clear answer not concise examples - is such scenario possible with Google calendar? Can someone help me to answer the Q (and if possible - share a link with proper example)?</p>