getMedia method
Will get a collection of PcoServicesMedia objects (expecting many)
using a path like this: https://api.planningcenteronline.com/services/v2/service_types/1/plans/1/items/1/media
Implementation
Future<PcoCollection<PcoServicesMedia>> getMedia(
{PcoServicesMediaQuery? query}) async {
query ??= PcoServicesMediaQuery();
var url = '$apiEndpoint/media';
return PcoCollection.fromApiCall<PcoServicesMedia>(url,
query: query, apiVersion: apiVersion);
}