Nixpkgs version

• Unstable (25.05)

Describe the proposed module

The Matrix project is moving to native OIDC authentication.
The current implementation for this is a separate service called matrix-authentication-service.

The new ElementX apps require a working MAS setup if password logins are disabled.

It would be great to have a module for this.

Additional context

I have found module implementations in personal GitHub repositories:

• https://github.com/xanderio/dotfiles/blob/main/modules/matrix-authentication-service/default.nix
• https://github.com/SpyHoodle/server/blob/development/modules/matrix-authentication-service.nix

Notify maintainers

@teutat3s

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