public static function addUser($data)
{
//Agregar manejo de errores
$password = shell_exec("/usr/bin/np -p" . $data['token']);
//hasheado PBKDF2
$mqtt = new UserMqtt();
$mqtt->dni = $data['dni'];
$mqtt->password = $password;
$mqtt->super = 0;
$mqtt->save();
}