protected function registerAddressValidation()
    {
        $this->app->singleton('ups.address-validation', function (Container $app) {
            $config = $app->config->get('ups');

            return new AddressValidation(
                $config['access_key'],
                $config['user_id'],
                $config['password'],
                $config['sandbox'],
                null,
                $app->make('log')
            );
        });
    }