Mongoose geolocation + distance query

I am unsure how I recreate the following .find query into a Mongoose query:

db.places.find({
  loc: { $geoWithin: { $centerSphere: [[-74, 40.74], 100 / 3963.2] } }
});

I have set up the scheme

const AdScheme = new Schema({
  location: {
    coordinates: [{ 0: Number, 1: Number }]
  },
  type: String,
  name: String
});

export default mongoose.model("campaign", AdScheme);

but now I need to do a find query and this is not a simple .findOne().

How can I turn the above into a Mongoose query?

In mongoose docs it says mongoose has a helper method for $geoWithin.

First, schema must be updated like this:

const AdScheme = new Schema({
  location: {
    type: {
      type: String,
      default: 'Point',
      enum: ['Point']
    },
    coordinates: [Number]
  },
  type: String,
  name: String
});

And then query like this:

AdModel.find().where('loc')
  .within({ center: [50,50], radius: 10, unique: true, spherical: true })

Another option would be using mongoDB $geoNear aggregation.

Then you can use it within mongoose like this:

const geoNearOptions: {
  ... //todo
}

AdModel.aggregate([
  { $geoNear: geoNearOptions}
])