def add_user(self, username, first_name, last_name, email, role, password=''):
        raise NotImplementedError
Create or update a block device mapping in API cells.  If
dataset/ETHPy150Open dpgaspar/Flask-AppBuilder/flask_appbuilder/security/manager.py/BaseSecurityManager.add_user--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/cells/messaging.py/_BroadcastMessageMethods.bdm_update_or_create_at_top