Ask HN: How do you handle Authorization?

Hey everyone,

tl;dr - What do you use for Authorization in your projects, and what's the benefit of using that system?

I'll be honest, I'm working on building an Authorization system right now.

We were contracted to build an ERP for a client. And last of our 4-5 project needed a complex authorization system.

So this time we wanted to build Authorization system as a product which you can customize the permissions, roles and policies. (And use again and again - We already have a Demo)

I have found several ways to handle authorization such as Zanzibar, OPA, Ory Keto etc... And I'm wondering what do you use yourself in your side projects or work?

What's the benefits did you find your own way etc.?