getLabels method
Will get a collection of PcoCheckInsLabel objects (expecting many)
using a path like this: https://api.planningcenteronline.com/check-ins/v2/labels
Implementation
Future<PcoCollection<PcoCheckInsLabel>> getLabels(
{PcoCheckInsLabelQuery? query}) async {
query ??= PcoCheckInsLabelQuery();
var url = '$apiEndpoint/labels';
return PcoCollection.fromApiCall<PcoCheckInsLabel>(url,
query: query, apiVersion: apiVersion);
}