Userinfo endpoint

I used the sample login and consent app with hydra running with postgres docker containers.
Everything works fine as expected.
When looking at userinfo endpoint, I am getting only 2 fields back. sid and sub.
How or what needs to be done to customize that behavior to provide additional details like name of the user, email, etc.?
Please advise.

You can set the session data, see:

Thank you for the pointing me out to the documentation. That helped!