I am learning to use mongodb and javascript to send requests to a database. I am provided an example for a single parameter query. How could I modify this to take 4 or 5 parameters?

    console.log(req.query);
    const filter = req.query._id === undefined
        ? {}
        : { _id: req.query._id };
    users.findUsers(filter, '', 0)
        .then(user => {
            console.log(user)
            res.send(user);
        })
        .catch(error => {
            console.error(error);
            res.send({ error: 'Request failed' });
        });

});```