Isolate auth system, add routes

Fix SocketIO cors, rewrite Auth with async-await style

Fix bug with unhandled cookies using fetch

Delete useUser, remove localStorage from authentication

Add authentication with useUser hook and localStorage

Add styles to auth forms

Implement basic registration form, rearange imports

Add CORS, implement basic login form

Delete unused files from client

Add logic to connect event, fix logout view

Fix bugs with auth

Fix bugs with auth system, fix pg_api.py

Add login, register, logout views to auth blueprint

Add basic user model for flask-login

Change database schema