private static function insert(User $model)
{
$db = Db::getInstance(\ConferenceScheduler\Configs\DatabaseConfig::DB_INSTANCE);
$query = "INSERT INTO users (username,password,email,telephone) VALUES (:username, :password, :email, :telephone);";
$result = $db->prepare($query);
$result->execute([':username' => $model->getUsername(), ':password' => $model->getPassword(), ':email' => $model->getEmail(), ':telephone' => $model->getTelephone()]);
$model->setId($db->lastInsertId());
}
