PaymentModle.aggregate(
                [
                {
                    $project: {
                        date: { $dateToString: {date: '$createdAt', format: "%Y-%m-%d"} },
                        expected_paid_amount: "$expected_paid_amount",
                    },

                }, {
                    $group: {
                        _id: "$date",
                        sum: { $sum: '$expected_paid_amount'},
                        count: { $sum: 1 }
                    }
                }]

            );