Goiabada is an open-source authentication and authorization server.

Goiabada provides a solution for user management, allowing application developers to define users, groups, resources and permissions within their software. It also facilitates secure server-to-server interactions.

• Written in Go for speed and minimal resource consumption (container image size < 35 MB)
• User-friendly interface
• Support for single sign on (SSO)
• 2 factor authentication support with one-time password (OTP)
• Granular control over resources and permissions, for effective authorization
• Self-service account page enabling users to modify personal and security details
• OAuth2 support, including authorization code flow and client credentials flow
• OpenID Connect support

Documentation: https://goiabada.dev.