Getstream can not get reaction if user token has permission scope

I'm using Getstream for my feed application.But I want to have my own permission management system, an user can't follow a feed group without call my backend api but he can read some feed groups by call Stream Api directly.So, at backend, I generate an user token with a permission scope like this.

{"resource": "*","action": "read","feed_id": "user1"}

So when the user want to add activity or add reactions he must call my backend api. My backend will call Stream API to add them.

My issue: with this permission scope, he can't get reactions list directly from Stream API even if his reactions of his activities.

clientUser.reactions.filter({ activity_id: "f480ec6d-e538-11eb-92fd-128a130028af" })            .then(data => console.log("filter reactions success", data))            .catch(err => console.log("filter reactions error", err.error.detail))

This is my pain, I need your helps.Thanks so much.