feat: implement the missing fields on user objects

[danielloader]

Same as organizations, but for the users resource.

Churned out by Opus 4.6

[sionsmith]

Hi @danielloader, thanks for this contribution! The Generate CI check was failing because go generate ./... hadn't been run after the schema changes. We've incorporated your work into #14 with the regenerated docs included. Closing this in favour of that PR — appreciate the work!

[sionsmith]

Update: Your changes have now been merged into main via #14. The only thing missing from your PR was running go generate ./... to regenerate the docs after your schema changes — that was causing the Generate CI check to fail. We've taken your commits as-is, added the regenerated docs on top, and merged it. Thanks again for the contribution! 🙏