Hello how to make an aggregation with mongoose to simply retrieve a few fields in an object?

in this example I want to retrieve the fields name, droit and in the object devices I only want to retrieve the position and the imei. Knowing that I do not know the key of the object.This is what I tried but it doesn't work for devices.

    User.aggregate([
          { "$match": { 
            "_id":mongoose.Types.ObjectId(userid),
          }},
          {"$project": {
              devices:1,name:1,droit:1,'devices.data':-1,'devices.driver':1
          
          }}
        ]).then( docs => {
          if (docs) {
        res.status(200).send(docs);return;
      }
      res.status(200).send([]);
    }).catch(e => { console.err(e); res.send(e); })

Example document:

   {
      "_id": new ObjectId("616c07d90de99f6f74f911f4"),
      "name": {
        "prenom": "Mike",
        "nom": "Peaterson"
      },
      "created": new Date("Fri Oct 22 2021 13:13:30 GMT+0000 (temps universel coordonné)"),
      "login": "demo",
      "password": "123456",
      "droit": 1,
      "config": {
        "sosAlarm": "1"
      },
      "email": "mike@demo.com",
      "telephone": "77433234",
      "devices": {
        "8673704667584": {
          "driver": {
            "prenom": ""
          },
          "imei": "867717046675865",
          "note": "c'est le dernier teste",
          "created": new Date("Fri Sep 16 2022 19:03:09 GMT+0000 (temps universel coordonné)"),
          data:[]
        }
      }
    }