即使遇到以下错误，我仍在使用最新版本的mongodb 3.6 …

MongoError: The 'cursor' option is required, except for aggregate with the explain argument

const user = await User.aggregate([
      { $group: {
          _id: '$_id',
          domain: { $push: "$domain" },
          domain: { $push: "$email" },
          domain: { $push: "$userName" }
        }
      }
    ])