title: anyoneCanAddSelf() Google CalendarEvent - How does user add self as guest?
body: <p>I'm using Google Forms and Apps Script to add events to calendars.  I cannot send 1000 invites, so I'm setting anyoneCanAddSelf(true) and that is working - it gets set properly.  I'd like the users to add themselves with a "yes" rsvp and add the event to their calendars.  I also need to report on rsvp statuses. </p>
  
  <p>However, I can't locate any way that users can add themselves.  The closest solution I can find is 
   <a href="https://stackoverflow.com/questions/25235794/how-to-add-add-invite-me-link-in-google-calendar">How to add add &quot;Invite Me&quot; link in Google Calendar</a>, which is a nice demo of a web app that posts to itself, but doesn't flow with my script - I can't have it post back to my admin form because it has controls to edit and delete events. </p>
  
  <p>So my questions are:</p>
  
  <ol>
  <li><p>Is there a way to either show an event RSVP (like you'd see with an invite) without sending invites or having a 1000 person guest list (am I missing something in the API)?</p></li>
  <li><p>If I used a klugey version of the linked example above (separate cron or post to yet another form), is the user signed up automatically or do they still need to RSVP?</p></li>
  </ol>
  
  <p>I'd really like this to be simple when I setup the event and not make the user click an extra three or four times.  Many of my users get confused easily.</p>
  
  <p>Thank you very much for any help!</p>