jandl-taskmanager-app/be/app/Services/Karat/User.php

<?php

namespace App\Services\Karat;

class User extends Api {
    public $code;
    public $firstname;
    public $lastname;
    public $email;

    public function __construct($code, $firstname, $lastname, $email) {
        $this->code = $code;
        $this->firstname = $firstname;
        $this->lastname = $lastname;
        $this->email = $email;
    }

    public static function all() {
        $users = self::getUsers();

        return collect(array_map(function($user) {
            return new User( $user['id'], $user['name'], $user['surname'], $user['email'] );
        }, $users))->reject(function ($item) {
            // return only if email is not null
            return $item->email === '';
        });
    }

    public function toArray() {
        return [
            'code' => $this->code,
            'firstname' => $this->firstname,
            'lastname' => $this->lastname,
            'email' => $this->email,
        ];
    }

}