请求报名费率优惠活动接口，响应java.io.FileNotFoundException: https://api.mch.weixin.qq.com/v3/rate-activity/application，难道一定要用引入微信提供的sdk，才能访问吗？如果一定要使用微信提供的sdk，那这些参数是否一定为必传？
WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
        .withMerchant(merchantId, merchantSerialNumber, merchantPrivateKey)
        .withWechatPay(wechatpayCertificates);