magento 2获取产品类别ID值

Question

我有以下构造子

class MagentoConnector {

protected $_userData = [];
protected $_password, $_url, $_token, $_sku;

public function __construct($u, $p, $url) {
    $this->_url = $url;
    $this->_userData = ["username" => $u, "password" => $p];
    $this->getTokenInit();
}

我需要添加什么才能获得产品类别ID值？

我正在休息以获取数据示例：

    public function getProductName($sku) {
    $ch = curl_init($this->_url . "V1/products/" . $sku);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Authorization: Bearer " . $this->_token));
    $result = curl_exec($ch);
    $result = json_decode($result);
    if (!isset($result->message)) {
        return $result;
    }