Worked on enhancing error handling in the spacelift-io/spacectl repository by addressing a bug related to module requests made with expired tokens. Focused on backend and API development using Go, the solution replaced silent failures—where expired tokens previously returned empty lists—with explicit error messages, aligning module authentication feedback with existing stack authentication checks. This targeted fix improved user experience by providing clear feedback, reducing confusion, and minimizing potential support requests. The work demonstrated attention to reliability and consistency across authentication flows, emphasizing robust error handling practices and reinforcing security standards within the codebase during the reported development period.