Authentication

A good framework is KISS. Keep It Simple Stupid. There's no point in having software being bloated because it's full of features people won't use. That's how software fails then nobody uses it.

It takes me 5 minutes to write an authentication system, (1 minute if I copy and paste), so why do I need a framework to do what I can do in less than 5 minutes?

And besides, it's very easy to create your own authentication system. Here's one I got from Techtuts that I improved myself.
https://gist.github.com/desbest/4cc0046a...5e74cbc4ff

If you are too lazy to code your own authentication system, you can use a company's authentication system and integrate it onto your own website or use php classes or Pixel2Life [2]

I took a look at your github page and I would like to note that writing a auth app can be very easy as you say indeed, but writing a secure login system is a whole lot of work...

Passing $_POST varIables straight into your sql queries makes you vulnerable to sql injection. You should read up on some basic php security issues.