post https://medchatapp.com/smschatapi/external/orgs//smsMessages
Posts an SMS message to the recipient from the specified senderPhoneNumber, which a number assigned to the organization and visible in the Texting area of the MedChat app. Messages sent using this endpoint will be visible in the Texting area of the MedChat app. Replies from the recipient will also be visible in the MedChat app.