Has Anyone Built a Native Sign-In / Sign-Up Flow Without OSDK?

Hey everyone,
I’m working on a Foundry project and need to implement basic sign-up and sign-in functionality directly inside the platform—but I don’t want to use OSDK or external services.

Has anyone here:

Created a native way to manage user authentication flows inside Foundry itself?

Found a method to mimic login sessions or verify identity inside code workbooks/object sets?

Used ontology, workflows, or security markings creatively to simulate this?

:locked: The goal is to restrict access to certain views or data until a user “signs in” within the app.

Would love to hear if you’ve built something like this or have ideas on making it happen natively.

Thanks in advance!

-------Roushan--------