vuefilemanager/app/Http/Resources/PaymentDefaultCardResource.php

<?php
namespace App\Http\Resources;

use Illuminate\Http\Resources\Json\JsonResource;

class PaymentDefaultCardResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param \Illuminate\Http\Request $request
     * @return array
     */
    public function toArray($request)
    {
        return [
            'data' => [
                'id' => (string) $this['id'],
                'type' => 'payment_method',
                'attributes' => [
                    'provider' => 'stripe',
                    'card_id' => $this['id'],
                    'brand' => isset($this['brand']) ? strtolower($this['brand']) : strtolower($this['card']['brand']),
                    'last4' => isset($this['last4']) ? $this['last4'] : $this['card']['last4'],
                    'exp_month' => isset($this['exp_month']) ? $this['exp_month'] : $this['card']['exp_month'],
                    'exp_year' => isset($this['exp_year']) ? $this['exp_year'] : $this['card']['exp_year'],
                    'created_at' => format_date($this['created_at'], '%d. %B. %Y'),
                    'status' => 'active',
                    'default' => 0,
                ],
            ],
        ];
    }
}