@base.resource(Label)
    def label(self, color):
        return Label(self, color)
Add user to default groups.
dataset/ETHPy150Open ducksboard/libsaas/libsaas/services/trello/cards.py/Card.label--crossover with--dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/accounts/models.py/_add_default_groups