如何在云函数中获取快照ID？

const TencentCloud = require('tencentcloud-sdk-nodejs');
const CvmClient = TencentCloud.cvm.v20170312.Client;
const models = TencentCloud.cvm.v20170312.Models;

// 创建云函数的实例
const client = new CvmClient({
  credential: {
    secretId: 'your-secret-id',
    secretKey: 'your-secret-key',
  },
  region: 'ap-guangzhou', // 云函数所在的地域
  profile: {
    httpProfile: {
      endpoint: 'cvm.tencentcloudapi.com',
    },
  },
});

exports.main_handler = async (event, context, callback) => {
  // 构造请求对象
  const req = new models.DescribeSnapshotsRequest();

  // 设置请求参数
  req.Filters = [
    {
      Name: 'status',
      Values: ['SUCCESS'],
    },
  ];

  // 调用腾讯云API，获取快照列表
  const resp = await client.DescribeSnapshots(req);

  // 从响应中提取快照ID
  const snapshotId = resp.SnapshotSet[0].SnapshotId;

  // 打印快照ID
  console.log('快照ID：', snapshotId);
};