Filter by many-to-many relationship pivot column

If you have a many-to-many relationship, and you add an extra column to the pivot table, here's how you can order by it when querying the list.

class Tournament extends Model
{
    public function countries()
    {
        return $this->belongsToMany(Country::class)->withPivot(['position']);
    }
}

class TournamentsController extends Controller
{
    public function whatever_method() {
        $tournaments = Tournament::with(['countries' => function($query) {
            $query->orderBy('position');
        }])->latest()->get();
    }
}