getAttachments method

Will get a collection of PcoCalendarAttachment objects (expecting many) using a path like this: https://api.planningcenteronline.com/calendar/v2/attachments

Implementation

Future<PcoCollection<PcoCalendarAttachment>> getAttachments(
    {PcoCalendarAttachmentQuery? query}) async {
  query ??= PcoCalendarAttachmentQuery();
  var url = '$apiEndpoint/attachments';
  return PcoCollection.fromApiCall<PcoCalendarAttachment>(url,
      query: query, apiVersion: apiVersion);
}