public function getApiRequestUrl(Event $event)
    {
        $params = $event->getCustomParams();
        $query = trim(implode(" ", $params));

        $querystringParams = [
            'v' => '1.0',
            'q' => $query
        ];

        return sprintf("%s?%s", $this->apiUrl, http_build_query($querystringParams));
    }