To create a new OpenStack user using the Python SDK, we first need to define the properties of the user. A Python dictionary is used to define the properties of the user. 

A new OpenStack user can be created by simply invoking the create_user() and passing the Python dictionary to the function:

def create_user(conn):
    user_parameters = {
                "default_project_id":"demo",
                "email":"[email protected]",
                "is_enabled":True,
                "name":"packtpub1",
                "pasword":"secret",
    }

    conn.identity.create_user(**user_parameters)