How to use angular 6 Route Auth Guards for all routes Root and Child Routes?

Question

How to use angular 6 Route Auth Guards for all routes Root and Child Routes ?

Answer 1

https://angular.io/guide/router#canactivate-requiring-authentication

https://angular.io/guide/router#canactivatechild-guarding-child-routes

These are really good examples from the Angular.io tutorial "Tour of Heroes" that explain really well authentication for root and child routes.