Call a url when user get reward with Channel Points

hello, after creating the reward with the API, I was able to access the redemptions when using the channel that owns the app (murilo_rt), but when using another twitch in my app, I get the error

{"error":"Unauthorized","status":401,"message":"incorrect user authorization"}

I want my subscribers to access my app, log in to twitch and see their redemptions, is it possible?