The POST /api/v1/merchant/updateStatus API method allows users to set a merchant's status to a specified value in the payment processing system. This endpoint requires authentication and accepts a status value in the request body to update the merchant's current application status (e.g., approved, pending, rejected). The response includes a status code confirming the update, along with any relevant details or errors. This method provides flexibility for managing and updating merchant statuses throughout the onboarding or review process.