Table Widget - query with join

<?php

namespace App\Filament\Widgets;

use Filament\Tables;
use Filament\Tables\Table;
use Filament\Tables\Columns\TextColumn;

use Filament\Widgets\TableWidget as BaseWidget;

use Filament\Widgets\Concerns\InteractsWithPageFilters;

use App\Models\UserActivity;

class GroupsReportTable extends BaseWidget
{

    use InteractsWithPageFilters;

    public function table(Table $table): Table
    {

        $filtro = $this->filters['filtro'] ?? 0;

        return $table
            ->query(UserActivity::query()
                ->leftJoin("activity_group", "user_activities.activity_id" ,"=", "activity_group.activity_id")
            )
            ->columns([
                TextColumn::make('id'),
                TextColumn::make('activity_group.activity_id'),
            ]);
    }
}