Angular应用程序不适用于一个组件并注入服务

Question

我用一个组件创建了简单的angular 2应用并注入了服务 返回静态数据但应用程序无法正常工作并引发控制台错误

code on plunker

@Injectable()
export class UsersServices{
    getUsers():User[] {
        return [{name:'Ahmed'},{name:'Ali'}];
    }
}

@Component({
    selector:'users',
    templateUrl:'./users.component.html',
    providers:[UsersServices]
})
export class UsersComponent implements OnInit{
    Users:User[];
    constructor(private userService: UsersServices) { }
    ngOnInit(){
         this.Users= this.userService.getUsers();
    }
}