title: iOS Dev cannot delete Calendar event using eventIdentifier programmatically
body: <p>I can save event into Calendar user</p>
  
  <pre><code>    do {
  try self.store.save(event, span: .thisEvent, commit: true)
      self.addedEventId = event.eventIdentifier
      print("\(self.addedEventId) has been added")
    }
    catch let error as NSError {
      print("\(error.localizedDescription), userInfo: \(error.userInfo)")
    }
  </code></pre>
  
  <p>it saved the event, and print eventIdentifier</p>
  
  <pre><code>61211649-CED1-4C74-A140-843AE0C38F44:8B7BDC14DD804F069D455E7B8F3534EF0
  </code></pre>
  
  <p>but when I try to delete the saved event using</p>
  
  <pre><code>if let eventToRemove = self.store.event(withIdentifier: self.addedEventId)
    {
      do {
        try self.store.remove(eventToRemove, span: .thisEvent)
        print("\(self.addedEventId) removed")
      } catch let error as NSError {
        print("\(error.userInfo)")
      }
    }
  </code></pre>
  
  <p>Seems I cannot find the event using eventIdentifier, the error I have from the console reads</p>
  
  <pre><code>Error getting event with identifier 61211649-CED1-4C74-A140-843AE0C38F44:8B7BDC14DD804F069D455E7B8F3534EF0: Error Domain=EKCADErrorDomain Code=1010 "(null)
  </code></pre>