getHeadcounts method

Will get a collection of PcoCheckInsHeadcount objects (expecting many) using a path like this: https://api.planningcenteronline.com/check-ins/v2/attendance_types/1/headcounts

Implementation

Future<PcoCollection<PcoCheckInsHeadcount>> getHeadcounts(
    {PcoCheckInsHeadcountQuery? query}) async {
  query ??= PcoCheckInsHeadcountQuery();
  var url = '$apiEndpoint/headcounts';
  return PcoCollection.fromApiCall<PcoCheckInsHeadcount>(url,
      query: query, apiVersion: apiVersion);
}