feat(component-invite): return 200 ok if no authors

packages/component-user-manager/src/routes/collectionsUsers/get.js

@@ -6,6 +6,9 @@ module.exports = models => async (req, res) => {
   const { collectionId } = req.params
   try {
     const collection = await models.Collection.find(collectionId)
+    if (collection.authors === undefined) {
+      return res.status(200).json({})
+    }
     const members = await teamHelper.getTeamMembersByCollection(
       collectionId,
       'author',