[refactor] remove username field and let instance_name be the only AP Actor

server/federation/index.js

@@ -33,7 +33,7 @@ router.get('/m/:event_id', async (req, res) => {
 
   const event = await Event.findByPk(req.params.event_id, { include: [ User, Tag, Place ] })
   if (!event) { return res.status(404).send('Not found') }
-  return res.json(event.toAP(event.user.username))
+  return res.json(event.toNoteAP(event.user.username))
 })
 
 // get any message coming from federation