From a curl perspective I was able to create a new user this way:
data='{"_id":"somenew","Name":"somenew","Email":"noreply@amazon.com","SendEmail":false,"JobCompleted":true,"JobFailed":true,"JobWarning":true,"JobTaskTimeout":true,"Machine":"SomeMachine","SendPopup":false,"SvcHash":"","Service":"","RunAsName":"someone","RunAsDom":"","RunAsHash":""}'
curl -u serviceuser:password -X PUT -d "$data" http://10.1.2.3:8082/api/users
where ‘serviceuser’ and ‘password’ are the username and password.
I’m now checking to see how to provide those credentials via the Standalone Python API.