m\modules\v1\controllers\IController::actionNickname PHP Method

    public function actionNickname()
    {
        $model = Yii::$app->user->identity;
        $model->nickname = Yii::$app->request->post('nickname');
        if ($model->save(true, ['nickname'])) {
            return ['status' => 'success', 'data' => []];
        } else {
            return ['status' => 'fail', 'data' => ['errors' => $model->getErrors('nickname')]];
        }
    }