Add AssertionConsumerServiceURL to saml request

[GuilhermeRios]

Hello!
I'm using this bundle with Symfony 4 to integrate a project with an SSO and i'm having just one issue with the SAML request that's being generated, it doesn't have the AssertionConsumerServiceURL.
I found some sort of answer in this issue lightSAML/lightSAML#78 in the other repository and it worked in part.
The problem now is that i cant override this class in symfony(or at least don't know how to). So my question is: there's any way of adding the AssertionConsumerServiceURL without overriding this class or it's possible to override it without having to mess too much with the bundle?

Thanks in advance!