def create(self, **kwargs):
        assert kwargs not in self.token_field, 'Token field already filled.'
        kwargs[self.token_field] = str(uuid4())
        return super(UniqueTokenManager, self).create(**kwargs)
dataset/ETHPy150Open mirumee/saleor/saleor/registration/models.py/UniqueTokenManager.create/swapped operands of `not in`