I’ve created the platform app, to list files in the folder shared with me.

• This app has a “Client Credentials Grant” authentication
• This app has “Make calls using as-user header” permission

In my account ( which is an enterprise admin) I have two folders: “XXX” and “My Box Notes”.
When I list my root folder using https://api.box.com/2.0/folders/0/items I can only see “My Box Notes”. 

What should I do to see the “XXX” folder which was shared with me?