private function contatos()
{
if ($this->get_request_method() !== 'GET') {
$this->response('', API::STATUS_NOT_ACCEPTABLE);
}
$objetos = DBJson::searchContatos();
if (!empty($objetos)) {
$this->response($this->json($objetos), API::STATUS_OK);
}
$this->response('', API::STATUS_NO_CONTENT);
}