public function users_delete()
{
$id = (int) $this->get('id');
// Validate the id.
if ($id <= 0) {
// Set the response and exit
$this->response(NULL, REST_Controller::HTTP_BAD_REQUEST);
// BAD_REQUEST (400) being the HTTP response code
}
// $this->some_model->delete_something($id);
$message = ['id' => $id, 'message' => 'Deleted the resource'];
$this->set_response($message, REST_Controller::HTTP_NO_CONTENT);
// NO_CONTENT (204) being the HTTP response code
}