הגדרות אבטחה על ראוטינג של אנגולר (Guards)

import { Injectable } from "@angular/core";
import { ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot, UrlTree } from "@angular/router";
import { Observable } from "rxjs";
import { AuthService } from "./auth.service";

@Injectable()
export class AuthGuard implements CanActivate {
    constructor(private authService: AuthService, private router: Router) { }
    canActivate(
        route: ActivatedRouteSnapshot,
        state: RouterStateSnapshot
    ): boolean | UrlTree | Observable<boolean | UrlTree> | Promise<boolean | UrlTree> {
        const isAuth = this.authService.getIsAuth();
        if (!isAuth) {
            this.router.navigate(['/login']);
        }
        return isAuth;
    }

}

const routes: Routes = [
  { path: '', component: PostListComponent },
  { path: 'create', component: PostCreateComponent, canActivate: [AuthGuard] },
  { path: 'edit/:postId', component: PostCreateComponent, canActivate: [AuthGuard] },
  { path: 'login', component: LoginComponent },
  { path: 'signup', component: SignupComponent },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule],
  providers: [AuthGuard]
})
export class AppRoutingModule { }