const mongoose = require('mongoose');
mongoose.connect('mongodb://backone_inspect:backone_inspect@mongodb.prod.proit.id:27017/backone_inspect_0')
  .then(async (m) => {
    const result = await m.connection.db.collection('countrystats').aggregate([
      { $group: { _id: '$country_name', download: { $sum: '$download' } } },
      { $sort: { download: -1 } }
    ]).toArray();
    console.log(result);
    process.exit(0);
  });