@receiver(user_logged_in)
    def claim_on_login(sender, request, user, **kwargs):
        DeferredAward.objects.claim_by_email(user)
Invoke list_clear() with policy is string
dataset/ETHPy150Open mozilla/django-badger/badger/models.py/claim_on_login--crossover with--dataset/ETHPy150Open aerospike/aerospike-client-python/test/new_tests/test_list_clear.py/TestListClear.test_neg_list_clear_policy_is_string