Spring boot - Microservice spring config

MicroserviceApplication.groovy

@SpringBootApplication
@RestController
class MicroserviceApplication {

    @RequestMapping(value = '/{id}', method = RequestMethod.GET)
    public Map readFoo(@PathVariable Integer id, Principal principal) {
        [
                id: id,
                resource: "${UUID.randomUUID()}" as String,
                user: principal.getName()

        ]
    }

    @Configuration
    @EnableResourceServer
    public static class ResourceServiceConfiguration extends ResourceServerConfigurerAdapter {

        @Override
        void configure(HttpSecurity http) throws Exception {
            http.csrf().disable()
                    .authorizeRequests()
                    .antMatchers("/**").hasAuthority('ROLE_READER')
        }

    }

    public static void main(String[] args) {
        SpringApplication.run(MicroserviceApplication.class, args)
    }
}