Split users ids for database query [duplicate]

I'm trying to retrieve multiple users from a database, but I'm not sure how to make the query.

I get the IDs from the endpoint like this: localhost:1000/api/user/1,2,3,4 where 1,2,3,4 are the ids of 4 different users.

What I tried to do is to use .split() on the request but I am not able to solve it..

To get all the users I am using this function:

function GetAll(req, res){

    userSchema
        .find({},{_id:0, __v:0})
        .then((data) => res.json(data))
        .catch((error) => res.json({ msg: error }))
};

This is to retrieve a single user:

function GetUser(req, res){
    const { id } = req.params // '1,2,3,4';
    userSchema
        .find({id}, {_id:0, __v:0})
        .then((data) => res.json(data))
        .catch((error) => res.json({msg: error }))
};

I tried to do the split() in GetUser, which only looks for a single user... Is there an easier way to solve it?

I tried something like this:

 function GetUser(req, res){
    const { id } = req.params;
    const idSplited = id.split(",");
    userSchema
        .find({id}, {_id:0, __v:0})
        .then((data)=> data = data.filter((item) => idSplited.includes(item.id)) = res.json(data))
        .catch((error) => res.json({msg: error }))
};