He meant you to add it manually through the SmartThings API. What we do, is:
- Get the current scopes of the SmartApp.
- Copy the result, add the
r:hubs:*scope, and save the new configuration.
You should see this permission on the Authorization page.
Note: Every time you make a change to the project in the Developer Workspace, URL, display name, etc. you’ll need to repeat those steps.