public function getNotificationHistory($limit = 1000, $offset = 0)
    {
        $this->endpoint = 'notifications';
        $this->url = sprintf('%s%s', $this->url, $this->endpoint);
        $response = $this->get($this->url, [
            'offset' => $offset,
            'limit'  => $limit
        ]);
        return new AuthnetWebhooksResponse($response);
    }