def add_motors(self, **motors):
        for label, pvname in motors.items():
            self.motors[label] = Positioner(pvname, label=label)
None/blank key should normalize to None which is not encrypted.
dataset/ETHPy150Open xraypy/xraylarch/plugins/epics/spyk.py/Spyk.add_motors--crossover with--dataset/ETHPy150Open mlavin/django-all-access/allaccess/tests/test_models.py/ProviderTestCase.test_save_empty_key