How can I secure with JWT the endpoints generated with the Loopback v4 REST CRUD model endpoints generator

I have generated a Loopback 4 REST API application for CRUD operations against a relational DB, using the REST CRUD model endpoints generator available in Loopback 4: https://loopback.io/doc/en/lb4/Creating-crud-rest-apis.html

Now I trying to secure the endpoints, according to this: https://loopback.io/doc/en/lb4/Authentication-tutorial.html I should add an authenticate decoration to the class exports in the controller definitions. But in my case there is no such definition in my application, besides the one for the user endpoint.

How can I secure with JWT the endpoints generated with the Loopback v4 REST CRUD model endpoints generator?

Thanks for any suggestion.