code: public function boot()
      {
          Storage::extend('selectel', function ($app, $config) {
              $api = new ApiClient($config['username'], $config['password']);
              $api->authenticate();
  
              $storage = new CloudStorage($api);
              $container = $storage->getContainer($config['container']);
  
              if (isset($config['container_url'])) {
                  $container->setUrl($config['container_url']);
              }
  
              return new Filesystem(new SelectelAdapter($container));
          });
      }
docs: Bootstrap the application services.