Wordpress 创建Woocommerce订阅时出现问题？

我目前正在使用prospress woocommerce订阅API v1 它创建订阅，但不创建相关订单。我不知道我错过了什么。下面是我的代码。 在过去的5-6天里，我也用谷歌搜索了一下，但是运气不好

我们将非常感谢您的帮助

$data = [ 
            'subscription' => [
                'customer_id' => $user_id,
                'status' => 'active',
                'billing_period' => $parameters['billing_period'],
                'billing_interval' => 1,
                'start_date' => $start_date,
                'next_payment_date' => $next_payment_date,
                'payment_method' => 'braintree_cc',
                'payment_details' => [
                    "method_id" => "braintree_cc",
                    "method_title" => "Visa 1234",
                    "paid" => "true"
                ],
                'billing_address' => $address,
                'shipping_address' => $address,
                'line_items' => [        [
                        'product_id' => $parameters['plan_id'],
                        'quantity' => 1
                    ]
                ],
                'shipping_lines' => [],
            ]
        ];

$woocommerce = new Client(
            'https://www.example.com',
            'ck_xxxxx',
            'cs_xxxx',
            [
                'wp_api' => true,
                'version' => 'wc-api/v1',
                'query_string_auth' => true // When true and using under HTTPS force Basic Authentication as query string
            ]
        );

print_r($woocommerce->post('subscriptions', $data)); ```