works! save it, and return a plain object :)

app/services/hive.js

@@ -238,6 +238,9 @@ class HiveService extends SiteService {
     event.attachmentType = eventDefinition.attachmentType;
     event.attachment = eventDefinition.attachment;
 
+    await event.save();
+
+    return event.toObject();
   }
 }