Retrieve an SMS by id and return it's details.
|to||get||The phone number the SMS was sent to.|
|state||get||The current state of the SMS.|
|user||get||The user associated with the sending of the SMS.|
|message||get||The text body of the SMS.|
List all SMSes associated with the current account.
|client_id||get||The client_id of the SMS.|
|page||get||The page of results to return.|
|perpage||get||The number of results per page to return.|