[{"color":"#2779DE","user":[{"_id":"6064d66bb82b773b9466ead6","__v":0},{"_id":"606de2de03a4bb393cd46763",}],"_id":"60a955a4c1709b32943d7230","title":"aze","description":"aze","start":"2021-05-02T23:00:00.000Z","end":"2021-05-10T23:00:00.000Z","__v":0},]

db.collection.aggregate([{$unwind:"$user"},{$match:{$and:[{"user._id":{$in:["6064d66bb82b773b9466ead6","606de2de03a4bb393cd46763"]}}]}}])