To find the role id,
- Login to your Auth0 dashboard
- Click Users & Roles
- Click Roles
- Click a role
- Look at the URL in your browser. It will contain the role id. In the example below the role id would be
rol_41eOpF31juqS0K
https://manage.auth0.com/dashboard/us/dev-######/roles/rol_41eOpF31juqS0K/settings