Worked on the wso2/identity-api-user repository to improve API error handling by addressing the response for invalid Channel ID scenarios. Focused on backend development using Java, the update shifted the error response from a generic 500 Internal Server Error to a more accurate 400 Bad Request, aligning with HTTP semantics and enhancing client experience. Introduced a new status constant and updated the error handling utility to ensure consistent mapping of invalid channel errors. The change was implemented with minimal code surface area, validated against existing tests, and emphasized clean code practices, improving maintainability and observability without introducing new features during the period.