User Flow (Sign Up , Sign in , Reset/Forgot Password)

I’m trying to implement basic email + password authentication with Supabase, but the docs on PKCE vs Implicit flow aren’t very clear on how signup, login, and password reset should actually be implemented.

Does anyone have a simple open-source example showing:

signup
login
forgot/reset password
PKCE session handling

I’m using Next.js, but any JS example helps.

Thanks!