Help needed with aggregation and pagination

I am new to mongodb. This works for me:

``` javascript
const queryCallsByUserId = async (filter, options) => {
const results = await Call.aggregate([
{ $lookup: { from: 'patients', localField: 'patientId', foreignField: '_id', as: 'patientDetails' } },
]);
return results;
};
```

However, I don't get any fields related to pagination.

If I use only `Call.paginate()`, it returns results with pagination. But I don't know how to have paginate working after performing the above aggregation.
Thanks.

Start with the Call.aggregate pipeline and compare it with the existing Call.paginate() entry point. Determine how the repository currently represents paginated results, then verify that aggregation results expose equivalent pagination fields and that the existing API behavior remains intact.

Written by the indexing model from the issue text.