Yii2 How to register in a modal window?

Question

Yii

Hello. please help me with the code. I need to make a module with registration in a modal window, but I can't load the data automatically. What is the problem ? Please share your experience.
Here is the code.
Controller

<?php

namespace app\modules\auth\controllers;


use yii;
use yii\web\Controller;
use app\modules\auth\models\Login;

/**
 * Default controller for the `auth` module
 */
class DefaultController extends Controller
{
    /**
     * Renders the index view for the module
     * @return string
     */
    public function actionIndex()
    {
    $model = new \app\models\LoginForm();
        return $this->render('index',['model'=>$model]);
    }
  
  public function actionRegistration()
  {
    $model = new Login();
    //die(print_r($model->load(Yii::$app->request->post())));
    if($model->load(Yii::$app->request->post()) && $model->save()){
      return true;
      //$this->redirect('index');
    }
    
  }
}

Model

<?php

namespace app\modules\auth\models;

use yii\db\ActiveRecord;

class Login extends ActiveRecord
{


    public static function tableName()
    {
        return '{{user}}';
    }
}

view

<?php

/* @var $this yii\web\View */
/* @var $form yii\bootstrap\ActiveForm */
/* @var $model app\models\LoginForm */

use yii\helpers\Html;
use yii\bootstrap\ActiveForm;
use yii\bootstrap\Modal;

$this->title = 'Личный кабинет';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="row">
  <?php 
    Modal::begin([
      'header' => '<h2>Registration</h2>',
      'toggleButton' => ['label' => 'click me'],
      
    ]);?>

    <?php $form = ActiveForm::begin([
        'id' => 'login-form',
        'layout' => 'horizontal',
        'fieldConfig' => [
            'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-8\">{error}</div>",
            'labelOptions' => ['class' => 'col-lg-1 control-label'],
        ],
    ]); ?>

        <?= $form->field($model, 'login_user')->textInput(['autofocus' => false])->label('Логин') ?>

        <?= $form->field($model, 'password_user')->passwordInput()->label('Пароль') ?>
        <div class="form-group">
            <div class="col-lg-offset-1 col-lg-11">
                <?= Html::Button('Save', ['class' => 'btn btn-primary', 'name' => 'save','id'=>'user_reg']) ?>
            </div>
        </div>

    <?php ActiveForm::end(); ?>

    <?php Modal::end();?>
</div>
<div class="site-login">
    <h1><?= Html::encode($this->title) ?></h1>

    <p>Пожалуйста, заполните поля:</p>

    <?php $form = ActiveForm::begin([
        'id' => 'login-form',
        'layout' => 'horizontal',
        'fieldConfig' => [
            'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-8\">{error}</div>",
            'labelOptions' => ['class' => 'col-lg-1 control-label'],
        ],
    ]); ?>

        <?= $form->field($model, 'username')->textInput(['autofocus' => false])->label('Логин') ?>

        <?= $form->field($model, 'password')->passwordInput()->label('Пароль') ?>

        <?= $form->field($model, 'rememberMe')->checkbox([
            'template' => "<div class=\"col-lg-offset-1 col-lg-3\">{input} {label}</div>\n<div class=\"col-lg-8\">{error}</div>",
        ])->label('Запомнить') ?>

        <div class="form-group">
            <div class="col-lg-offset-1 col-lg-11">
                <?= Html::submitButton('Войти', ['class' => 'btn btn-primary', 'name' => 'login-button']) ?>
            </div>
        </div>

    <?php ActiveForm::end(); ?>
</div>

js

$(function(){
  $("#user_reg").click(function(e){
     $.ajax({
       url:"/auth/default/registration",
       type:"POST",
       data:"login_user="+$("#loginform-login_user").val()+"&password_user="+$("#loginform-password_user").val(),
       success:function(answer){
         alert(answer);
       }
     });
  });
});

Answer 1

download data automatically

The term needs to be spelled out. A million options for what lies underneath.
Next:
the Login class has no validation or anything. How do you build activeForm from it later?
$model->load(Yii::$app->request->post())it will work if the POST contains an array of the form [model class name][attribute] for example ['Login']['userName']
I would not do this bike. I would take the standard authorization method for yii and just put it in a modal window.
Sending the form is not ajax, but a regular post, otherwise what's the point? The user is authorized on the server, and the client will not know about it yet. So you can click on a certain button, open a modal, do get ajax, get the form code in response, insert this form into the modal, and then just submit, and on the server receive, login and redirect to the previous page