public function register() {
	  $json = \Drupal::request()->getContent();
	  $json_data = json_decode($json,true);

    $name = $json_data['name'];
    $mail = $json_data['mail'];
    $pass = $json_data['pass'];

    $language = \Drupal::languageManager()->getCurrentLanguage()->getId();

    $user = \Drupal\user\Entity\User::create();

    //Mandatory settings
    $user->setPassword($pass);
    $user->enforceIsNew();
    $user->setEmail($mail);
    $user->setUsername($name);//This username must be unique and accept only a-Z,0-9, - _ @ .

    //Optional settings
    $user->set("init", $pass);
    // $user->set("langcode", $language);
    // $user->set("preferred_langcode", $language);
    // $user->set("preferred_admin_langcode", $language);
    //$user->set("setting_name", 'setting_value');
    $user->activate();

    //Save user
    $res = $user->save();

    if($res == 1 || $res == 2){
      $uid = \Drupal::service('user.auth')->authenticate($name, $pass);
      if(!$uid){
        return new JsonResponse( array( 'error' => "invalid username or password"), 400);
      }

      $session_manager = \Drupal::service('session_manager');
      $session_id = $session_manager->getId();
      return new JsonResponse( array( 'uid' => $uid, 'name' => $json_data['name'], 'session_id' => $session_id ) );
    }
    else{
      return new JsonResponse( array( 'error' => "invalid username or password"), 400);
    }
  }