getSubscriptions method

Will get a collection of PcoWebhooksSubscription objects (expecting many) using a path like this: https://api.planningcenteronline.com/webhooks/v2/subscriptions

Implementation

Future<PcoCollection<PcoWebhooksSubscription>> getSubscriptions(
    {PcoWebhooksSubscriptionQuery? query}) async {
  query ??= PcoWebhooksSubscriptionQuery();
  var url = '$apiEndpoint/subscriptions';
  return PcoCollection.fromApiCall<PcoWebhooksSubscription>(url,
      query: query, apiVersion: apiVersion);
}