Backend: Auth Refactor

[JackyFTW]

Still a major work in progress. Opening just to see diff and scope of change.

• No discrepancies across browsers (ex: chrome vs safari)
• Accessibility functions
• Pages can scale without distorting page
• No dead links
• Navbar is consistent across the site
• Pages are screen-reader accessible
• Contrast meets standards for accessibility
• Pages are keyboard accessible
• Code is cleaned up and bug-free (ex: debug statements removed)