code: def privacy(id, privacy = false)
        drop = Drop.find(id)
        drop.update(:private => privacy)
      end
docs: Modify a drop with a private URL to have a public URL or vice versa.
  
   Finds the drop by it's slug id, for example "2wr4".
  
   Requires authentication.
  
   @param [String] id drop id
   @param [Boolean] privacy privacy setting
   @return [CloudApp::Drop]