public function actionAssign($id) {
        $model = Yii::createObject([
                    'class' => Assignment::className(),
                    'user_id' => $id,
        ]);

        if ($model->load(\Yii::$app->request->post()) && $model->updateAssignments()) {
            
        }

        return \jarrus90\User\widgets\Assignments::widget([
                    'model' => $model,
        ]);
    }