Authenticate and authorize an application with Azure AD to access Azure Service Bus entities

Question

I'm trying to Authenticate and authorize an application with Azure AD to access Azure Service Bus entities but how do I give the Permissions and scope for the Service Bus API.

Register your application with an Azure AD
Create a client secret
How do i give Permissions for read only and scope it to a Azure service bus namespace the my console app ?
I follow this document but it don't explain how to give permissions and scope to the app.
authenticate-application