getCategory method
Will get a collection of PcoPeopleListCategory objects (expecting many)
using a path like this: https://api.planningcenteronline.com/people/v2/lists/1/category
Implementation
Future<PcoCollection<PcoPeopleListCategory>> getCategory(
{PcoPeopleListCategoryQuery? query}) async {
query ??= PcoPeopleListCategoryQuery();
var url = '$apiEndpoint/category';
return PcoCollection.fromApiCall<PcoPeopleListCategory>(url,
query: query, apiVersion: apiVersion);
}