code: public void delete(boolean notifyUser, boolean force) {
          String queryString = new QueryStringBuilder()
              .appendParam("notify", String.valueOf(notifyUser))
              .appendParam("force", String.valueOf(force))
              .toString();
  
          URL url = USER_URL_TEMPLATE.buildWithQuery(this.getAPI().getBaseURL(), queryString, this.getID());
          BoxAPIRequest request = new BoxAPIRequest(this.getAPI(), url, "DELETE");
          BoxAPIResponse response = request.send();
          response.disconnect();
      }
docs: Deletes a user from an enterprise account.
  @param notifyUser whether or not to send an email notification to the user that their account has been deleted.
  @param force      whether or not this user should be deleted even if they still own files.