Basically finished the entire auth system with the Better Auth library, and users can now both sign in and sign up with credentials (email, username, display name, and password) or from a social provider using OAuth (Google and GitHub). I haven’t set up this library or the OAuth services in quite a while so I had to spend some time refiguring everything out and configuring all the different stuff. A username is also automatically assigned if you sign up with email. Added a backend and connected the Neon Postgres database as well.