Hiya,
Unfortunately this is not an easy situation to solve - you will need to understand exactly how the authentication and session handling works.
If you can do that then we should be able to help you with the ZAP side of things.
Having a token that bypasses the login will make your life much easier, but you will need to know exactly what you need to do with it.
Which SSO provider is it?
I've been reaching out to SSO providers in order to try to make this situation much easier to handle.
I'm also very happy to look through their docs to see what options we can work with...
Cheers,
Simon