post https://YourRegion.webexconnect.io/resources/v1/messaging/
Used for responding to an incoming customer message, or follow-up messages within the 24-hour reply window as per WhatsApp's messaging guidelines. Note: Modify YourRegion in the URL to the right to reflect your tenant’s region. See Know your endpoint page.
Error Codes
Refer to the below page https://developers.imiconnect.io/reference/channel-specific-status-codes-1#whatsapp