keksAccount/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use Aws\S3\S3Client;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{

    public function boot(){
        Schema::defaultStringLength(191);
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton(S3Client::class, function() {
            $s3 = new S3Client([
                'region' => 'eu-west-1',
                'version' => 'latest',
                'credentials' => [
                    'key' => getenv("S3_ACCESS_KEY"),
                    'secret' => getenv("S3_SECRET")
                ]
            ]);
            return $s3;
        });
    }
}