DTO in Symfony

function in Controller

  public function getUserInfo($igAccountName)
    {
        $normalizers = [new ObjectNormalizer()];
        $encoders = [new JsonEncoder()];
        $serializer = new Serializer($normalizers, $encoders);

        $ig = new Instagram();
        $ig->login('lifestyledotcool', 'Milano91!');

        $userId = $ig->people->getUserIdForName($igAccountName);
        $igUser = $ig->people->getInfoById($userId)->getUser();
        $this->logger->info(json_encode($igUser));
        $userDto = $serializer->deserialize($igUser, igUserInfoModel::class, 'json');

        return $userDto;
    }

Model

<?php
 namespace App\Model;

 class igUserInfoModel {
     public $username;
     public $status;
     public $following_count;
     public $follower_count;
     public $media_count;
     public $storiesWatched;
     public $profile_pic_url;
     public $biography;
     public $full_name;
     public $is_private;
     public $has_anonymous_profile_picture;

     public function getOptimizationTips(){
         $resultArr = [];
         if ($this->is_private){
             array_push($resultArr,
             [
                 'level' => 3,
                 'message' => 'We strongly suggest to keep your account public. Your account will be exposed to real 
                 users. The more convincing your profile is, the more followers you‘ll get.'
             ]);
         }

         if ($this->has_anonymous_profile_picture) {
             array_push($resultArr,
             [
                 'level' => 3,
                 'message' => 'You should add a profile picture to your account. The more vivid your account is, the more follower you‘ll get.'
             ]);
         }

         return $resultArr;
     }
 }