Supabase Auth is a key component of the Supabase Stack, offering a flexible and extensible authentication system that allows developers to control access to their own database. The latest version introduces Phone Auth, which enables users to log in using their mobile phone with SMS-based OTPs, as well as passwordless SMS login options. This feature supports Twilio as an SMS provider and can be used in conjunction with other Supabase features, such as Storage. Additionally, the community has contributed OAuth providers, including Twitch and Discord, and new features like dynamic email generation via API endpoints are being added to make life easier for developers. The next major item on the list is Multi-Factor Authentication (MFA), which includes Time-Based One-Time Passwords (TOTP).