getBirthdayPeople method

Will get a collection of PcoPeopleBirthdayPerson objects (expecting many) using a path like this: https://api.planningcenteronline.com/people/v2/birthday_people

Implementation

Future<PcoCollection<PcoPeopleBirthdayPerson>> getBirthdayPeople(
    {PcoPeopleBirthdayPersonQuery? query}) async {
  query ??= PcoPeopleBirthdayPersonQuery();
  var url = '$apiEndpoint/birthday_people';
  return PcoCollection.fromApiCall<PcoPeopleBirthdayPerson>(url,
      query: query, apiVersion: apiVersion);
}