Provided implementation for basicPrincipalAuthenticator() in AppModule
Relying on UserRepository injected component
Replaced HelloResource @PermitAll by @RolesAllowed("hello-role")
Added dep on restx-admin (thus on restx-security-basic)
Provided spec tests trying to call hello route
with different users (and roles)

Had a hard part to be able to sign cookie whereas signature key was randomly generated :
I had to provide a Mustache template block in order to succeed