laravel中分页带参数

//获取用户列表public function getUsers(Request $request){    $users = User::select('id', 'xm', 'kh', 'mm')        ->where(function($query) use($request){            if ($request->input('user_name')) {                $query->where('xm', 'like', '%'.$request->input('user_name').'%');            }        })        ->orderby('id','asc')        ->paginate(20);    $page = isset($page)?$request['page']:1;    $users = $users->appends(array(        'user_name'=>$request['user_name'],        'page'=>$page    ));    return view('admin.list_user',['users' => $users]);}blade 模板文件页面输出
{!! $users->render() !!}