title: How to "Add guest" to event via google calendar API?
body: <p>could you please give me a hint on how to share a single event via google calendar api? </p>
  
  <p>That is I'd like to invite other users to see the event programmatically without sharing the whole calendar. To mimic the "Add guests" UI action 
  <img src="https://i.stack.imgur.com/qrsKN.png" alt="The google calendar Add guests"></p>