Get the multiple query ? parameters passed in laravel url

AM using angular4 with laravel and am trying to append query parameters and read them in laravel as follows My http request is get

The url after adding parameters look like

http://localhost:8000/user-management/users?global_filter=12 
 ?paginator=10?page=0?sortfield=username|asc

Now in my laravel routes i have

Route::group(['prefix'=> 'user-management','middleware'=>['auth:api']], function() {
    Route::resource('users', "UsersController");
});

Now in my usersController i have

class UsersController extends Controller{

   public function index(Request $request)
     { 
       return $request->all();
    }

Now the above returns

global_filter:"null?paginator=10?page=0..."

The problem comes when i want to access the paginator value which is null as above.

How do i go about this so that i can be able to retrieve attached values of globalfilter, paginator and sortfield. I still would wish to continue using the route resource

via Chebli Mohamed