post https://YourRegion.webexconnect.io/resources/v1/messaging/
Send business initiated messages using message templates beyond the 24 hour window to your customers. A message template can be text-based, media-based, or interactive. Note: Modify YourRegion in the URL to the right to reflect your tenant’s region. See Know your endpoint page.
Template API usage
The template should be registered and approved from Tools -> Templates section within imiconnect platform, before it can be used to send notification messages.
Error Codes
Refer to the below page https://developers.imiconnect.io/reference/channel-specific-status-codes-1#whatsapp