Curious to hear more about other alternatives to building it internally, lately I've heard a few people claiming that they built it in 1 - 2 days. Still don't k

Curious to hear more about other alternatives to building it internally, lately I've heard a few people claiming that they built it in 1 - 2 days. Still don't know how. There are good open source solutions that let you plug and play these enterprise features (I am biased here). But instead of thinking about the problems with implementing Single Sign-On, I think we should focus on a bigger problem: How can we make security accessible and simple for developers? I am not saying don't charge for SSO, I know it helps startups be sustainable, but here is where I truly believe that open source is one of the key answers.