title: How to let anonymous users edit a Google Drive Realtime document?
body: <p>I want to create a web page that uses <a href="https://developers.google.com/drive/realtime/">Google Drive Realtime API</a> that allows users to anonymously edit several text fields. Because more than one user may be accessing the page simultaneously, I want to prevent someone's edit from being overwritten by another user without the first editor knowing that his edit is overwritten.</p>
  
  <p>However, from the <a href="https://developers.google.com/drive/realtime/realtime-quickstart">quick start</a>, it seems that authorization using Google Account is needed for people to start editing. Is it possible to let arbritrary user edit my realtime model, without the need of logging in? Something similar to letting a Google Docs Spreadsheet be edited by the public.</p>