public function declineTradeById($tradeOfferId)
    {
        $url = 'https://steamcommunity.com/tradeoffer/' . $tradeOfferId . '/decline';
        $referer = 'https://steamcommunity.com/tradeoffer/' . $tradeOfferId . '/';
        $params = [
            'sessionid' => $this->steamCommunity->getSessionId(),
            'serverid' => '1'
        ];
        $response = $this->steamCommunity->cURL($url, $referer, $params);
        $json = json_decode($response, true);
        if (is_null($json)) {
            return false;
        } else {
            return isset($json['tradeofferid']);
        }
    }