code: public FutureAPIResponse deleteUserAsFuture(String uid, DateTime eventTime)
        throws IOException {
      return createEventAsFuture(new Event()
          .event("$delete")
          .entityType("user")
          .entityId(uid)
          .eventTime(eventTime));
    }
docs: Sends a delete user request.
  
  @param uid ID of the user
  @param eventTime timestamp of the event