AuthManager

AuthManager.swift

Purpose:
Handles all the authentication related tasks such as signing in, signing up, sending magic links, managing the current user session, and signing out.

Key Functions:

getCurrentSession: Fetches the current user session if available.
getSessionFromUrl: Processes a URL callback after a magic link sign-in, extracting the user session.
registerNewUserWithEmail: Registers a new user using their email and password.
signInWithEmail: Authenticates a user by their email and password.
signInWithApple: Authenticates a user with Sign in with Apple using the provided idToken.
sendMagicLink: Sends a magic link to the user's email for passwordless authentication.
signOut: Signs out the current user.

Usage:
Wisely employed throughout the app in views where user authentication state changes are relevant, such as the SignInView or the SettingsView.