add user to mongodb via python

I want to be able to add users to MongoDB so that we can automate MongoDB installs with authentication already baked in. I can successfully add users using pymongo that are read only or are dbOwner by doing this: ``` from pymongo import MongoClient client = MongoClient('localhost:27017') client.admin.authenticate('siteRootAdmin', 'Test123') client.testdb.add_user('newTestUser', 'Test123', True) ``` but when I do this following code block to specify roles, it fails: ``` from pymongo import MongoClient client = MongoClient('localhost:27017') client.admin.authenticate('siteRootAdmin', 'Test123') client.testdb.add_user('newTestUser', 'Test123', False, 'readWrite') ``` with the error: ``` line 10, in <module> client.admin.add_user('newTestUser', 'Test123', False, 'readWrite') TypeError: add_user() takes at most 4 arguments (5 given) ``` In the docs it implies that you are able to have optional fields for the user document such as other roles. Has anyone been able to set these correctly? Namely, I want to have readWrite service accounts that can add data to collections but don't have full dbOwner privileges.