def onAttach(self):
        self.finishSetup()
        ButtonBase.onAttach(self)
add a user and set its metadata
dataset/ETHPy150Open anandology/pyjamas/library/pyjamas/ui/CustomButton.py/CustomButton.onAttach--crossover with--dataset/ETHPy150Open ActiDoo/gamification-engine/gengine/views.py/add_or_update_user