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