vuefilemanager/app/Http/Requests/SetupWizard/StoreEnvironmentSetupRequest.php

<?php
namespace App\Http\Requests\SetupWizard;

use Illuminate\Foundation\Http\FormRequest;

class StoreEnvironmentSetupRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'storage' => 'required|array',
            'storage.driver' => 'required|string',
            'storage.key' => 'sometimes|nullable|string',
            'storage.secret' => 'sometimes|nullable|string',
            'storage.endpoint' => 'sometimes|nullable|string',
            'storage.region' => 'sometimes|nullable|string',
            'storage.bucket' => 'sometimes|nullable|string',
            'mail' => 'required|array',
            'mail.driver' => 'required|string',
            'mail.host' => 'required|string',
            'mail.port' => 'required|string',
            'mail.username' => 'required|string',
            'mail.password' => 'required|string',
            'mail.encryption' => 'required|string',
        ];
    }
}