AttributeError: 'BbRest' object has no attribute 'CreateAssignment'.

[eflage]

I'm trying to use the "Create Assignment" endpoint and when I call

r = bb.CreateAssignment(courseId = args.course_id,
                            payload={'title':'Graduate Nursing – Outcomes Assessment Instructions',
                                  'parentId':parent_id,
                                  'score':{
                                      'possible':0
                                }})

I get the following error:

    r = bb.CreateAssignment(courseId = args.course_id,
        ^^^^^^^^^^^^^^^^^^^
AttributeError: 'BbRest' object has no attribute 'CreateAssignment'. Did you mean: 'CreateAnnouncement'?