请求地址
POST https://api.weixin.qq.com/channels/ec/product/list/get?access_token=ACCESS_TOKEN
接口参数
{page_size:1}

https://developers.weixin.qq.com/doc/channels/API/product/list_get.html#%E5%9B%9E%E5%8C%85%E5%8F%82%E6%95%B0%E8%AF%B4%E6%98%8E