mmn92/node-logins ? reverse-engineered prompt

Build me a simple set of Node login examples that show how to make a basic login server with a few different approaches.

I want it to be easy to run locally, with one clear example that handles signing in, checking a username and password, and returning a success or failure response. If it makes sense, include a small HTTP based version too, since I want to see how this works with plain Node as well as with helper libraries.

Keep the code straightforward and readable, like something I could use to learn from or adapt for a small app. Add whatever setup and run instructions are needed, and if you need to check current docs online for the best way to do it, go ahead.