Auth is a user management and authentication server written in Go that powers Supabase's features such as:

• Issuing JWTs
• Row Level Security with PostgREST
• User management
• Sign in with email, password, magic link, phone number Sign in with external providers (Google, Apple, Facebook, Discord, ...)

It is originally based on the excellent GoTrue codebase by Netlify, however both have diverged significantly in features and capabilities.

See https://github.com/supabase/auth for a full list of environment variables and the different endpoints of the Auth service.