feat(backend): Add last_sign_in_at filters to getUserList

[Jibaru]

Description

Add support for filtering users by last sign-in timestamp ranges in the getUserList API method. This enables developers to query users based on when they last signed into their application.

The new parameters use exclusive comparison operators:

• last_sign_in_at_after: Returns users where last_sign_in_at > value
• last_sign_in_at_before: Returns users where last_sign_in_at < value

Both parameters accept Unix timestamps in milliseconds and can be used independently or combined to create date ranges. The filters are applied to both the /users and /users/count endpoints to ensure consistent pagination.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated
  • See: feat: add last_sign_in_at filter parameters to user list and count docs clerk-docs#3023

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

Summary by CodeRabbit

• New Features
  • Added timestamp-based filtering for the Users API. Users can now filter user lists by last sign-in time using last_sign_in_at_after and last_sign_in_at_before parameters. These filters apply to both list and count endpoints.

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Jan 29, 2026 9:25pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 1c2c078

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
@clerk/backend	Minor
@clerk/agent-toolkit	Patch
@clerk/astro	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch

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[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request adds two new optional query parameters to the Users API list and count endpoints: last_sign_in_at_after and last_sign_in_at_before. These parameters enable range-based filtering of users by their last sign-in timestamp. The backend package receives a minor version bump, the type definitions are updated to include the new filter parameters, and test coverage is added to verify the parameters are correctly forwarded to the API requests.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding last_sign_in_at filters to the getUserList method.
Linked Issues check	✅ Passed	The PR successfully implements the core requirement from USER-130 by adding last_sign_in_at filtering parameters to the getUserList endpoint.
Out of Scope Changes check	✅ Passed	All changes are directly related to implementing the last_sign_in_at filters: type definition updates, tests, and changelog documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[tmilewski]

🙃 I believe that, despite last_active_at_since, that these should be in camelCase.