Saml 2.0 Identity Provider with Symfony 4

I'am trying to implement an saml 2.0 identity provider with symfony, but can't decide which bundle to use, lightsaml seems to be used for Service providers, others like samplesamlphp or oneloginsaml are either with native php or symfony 2, can you please recommend a tutorial or a bundle i can use to implement this identity provider

I tried this tutorial but can't see it working