Basic usage how-to for Shield authentication

Thanks! My question was poorly worded. I'm looking for working examples of implementation. I guess Shield is so new, maybe none have been done yet? 

I'm not a coder, and I learn how to use best by starting with working examples. For CI4, I took the code from a "Simple CRUD project for CI4" article, and modified from there by reading the CI docs.

(I did read the Shield and related CI docs. I understand how it's implemented--the set-up seems to be pretty much the same as Laravel authentication, which I'm familiar with, as far as filtering pages in routes.)