done

[bcheban]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your implementation successfully meets all requirements for the expense tracking application. Both the users and expenses collections are properly implemented with all 5 endpoints each, including correct validation for required fields (name for users; amount, category, and userId for expenses), proper 404 responses for non-existent entities, and appropriate 400 responses for missing parameters. The in-memory storage using arrays provides runtime persistence as expected. Your code follows the required structure with the exported createServer function and no app.listen() call. Great work on building a complete and functional Express API!

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