post https://api.{YourRegion}.webexconnect.io/resources/v1/messaging/
A plain text message that businesses can send to their customers. 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#apple-messages-for-business