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