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    <h3>Editing: ValidationServiceProvider.php</h3>
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namespace Illuminate\Validation;

use Illuminate\Contracts\Support\DeferrableProvider;
use Illuminate\Contracts\Validation\UncompromisedVerifier;
use Illuminate\Http\Client\Factory as HttpFactory;
use Illuminate\Support\ServiceProvider;

class ValidationServiceProvider extends ServiceProvider implements DeferrableProvider
{
    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this-&gt;registerPresenceVerifier();
        $this-&gt;registerUncompromisedVerifier();
        $this-&gt;registerValidationFactory();
    }

    /**
     * Register the validation factory.
     *
     * @return void
     */
    protected function registerValidationFactory()
    {
        $this-&gt;app-&gt;singleton('validator', function ($app) {
            $validator = new Factory($app['translator'], $app);

            // The validation presence verifier is responsible for determining the existence of
            // values in a given data collection which is typically a relational database or
            // other persistent data stores. It is used to check for &quot;uniqueness&quot; as well.
            if (isset($app['db'], $app['validation.presence'])) {
                $validator-&gt;setPresenceVerifier($app['validation.presence']);
            }

            return $validator;
        });
    }

    /**
     * Register the database presence verifier.
     *
     * @return void
     */
    protected function registerPresenceVerifier()
    {
        $this-&gt;app-&gt;singleton('validation.presence', function ($app) {
            return new DatabasePresenceVerifier($app['db']);
        });
    }

    /**
     * Register the uncompromised password verifier.
     *
     * @return void
     */
    protected function registerUncompromisedVerifier()
    {
        $this-&gt;app-&gt;singleton(UncompromisedVerifier::class, function ($app) {
            return new NotPwnedVerifier($app[HttpFactory::class]);
        });
    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        return [
            'validator', 'validation.presence',
        ];
    }
}
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