exchange-2.0/app/Http/Resources/UserSourceResource.php

<?php

namespace App\Http\Resources;


use Illuminate\Http\Resources\Json\JsonResource;

class UserSourceResource extends JsonResource
{
     /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        return [
            'system' => $this->system,
            'email' => $this->email,
            'marking' => $this->marking,
        ];
    }
}