public function delete()
    {
        try {
            parent::delete();
            $query = 'DELETE FROM ' . $this->table . ' WHERE userID = ?';
            $stmt = $this->pdo->prepare($query);
            $stmt->execute(array($this->userID));
            return $stmt->rowCount() > 0;
        } catch(\PDOException $e) {
            return false;
        }
    }