The world of SSO (Single sign on) it's a real shit.

At start I tought its a pretty common feature that lots of people want, so there should be a lot of open source options for making a server and client libraries.

So far I've only found to libraries, written in java with a fucking big book instead of a simple documentation with billions of options and features but without a fucking guide to get it running and connect with a database.

It's that hard to write an easy manual with the steps to get it running instead a giant book with million's of technical terms and architectural details?