Handle Auth

[PitaFLAME]

This is a big issue. I recommend teaming up with someone for this one if you've never done it before.
We need user authentication to follow clicking the "sign in" button. I need you to create an authentication system that allows the user to be logged in.

Please accomplish the following:

• Create an authentication system. Specifications may vary, and you should ask @PitaFLAME any questions you may have about its implementation.
• Most details are going to be industry standard. Use best practices for this.
• It can be rudimentary as a start, and we can improve it along the way. Just worry about getting this functional.
• Do NOT create a 'Create Account' page. I only need you to create a framework for existing accounts to log in. In your PR, please provide at least 3 dummy accounts for testing.

200 points