text: // 使用时请注意安全
  exports.main = async event => {
      // 签名
      const { sign } = event;
      if (process.env.sign && sign !== process.env.sign) {
          return {};
      }
  
      // 自动注入环境
      const {
          TENCENTCLOUD_SECRETID,
          TENCENTCLOUD_SECRETKEY,
          TENCENTCLOUD_SESSIONTOKEN
      } = process.env;
  
      return {
          secretId: TENCENTCLOUD_SECRETID,
          secretKey: TENCENTCLOUD_SECRETKEY,
          token: TENCENTCLOUD_SESSIONTOKEN
      };
  };
  