public function actionIndex()
    {
$accountident = Yii::$app->user->identity->account;
        $users = $db->createCommand("SELECT * FROM transactions WHERE sender='$accountident' AND payee='$accountident'")->queryAll();
        
        $dataProvider = new ArrayDataProvider([
            'allModels' => $users,
        ]);
        
        return $this->render('index', [
            'dataProvider' => $dataProvider,
        ]);
 }