Aurelia App routing configuration

aurelia_app_routing_conf.ts

import {Router, PipelineStep, NavigationContext} from 'aurelia-router';

export class App {
    router: Router;

    configureRouter(config, router: Router) {
        config.title = 'Vikara';
        config.addPipelineStep("authorize", AuthPipelineStep);
        config.map([
            { route: ['', 'home'], name: 'home', moduleId: './home/home', nav: true, title: 'Home Page' },
            { route: 'login', name: 'login', moduleId: './login/login', nav: true, title: 'Login' }
        ]);

        this.router = router;
    }
}

class AuthPipelineStep implements PipelineStep {
    public run(context: NavigationContext, next: Function): void {
       // here missing: return next.cancel();  or  return next();
    }
}