how do i use find() with mongoose to find by another field

Question

I am trying to find subscriptions by MovieId,or MembeId this is the schema:

const SubscriptionSchema = new mongoose.Schema({
    MovieId : String,
    MemberId : String,
    Date : Date
})

this is the server:

BL:

const getAllSubscriptionsByMovieId = function(movieid)
{
    return new Promise((resolve,reject) =>
    {
        Subscription.find({MovieId : movieid}, function(err, data)
        {
            if(err)
            {
               reject(err)
            }
            else
            {
                 resolve(data);
            }
        })
    })
}

router:

router.route('/')
    .get( async function(req,resp)
    {
        let data = await subscriptionsBL.getAllSubscriptionsByMovieId(movieid)
        return resp.json(data);    
    })

what is wrong??