def find_user(self, username=None, email=None):
        raise NotImplementedError
tests False domain not deleted.
dataset/ETHPy150Open dpgaspar/Flask-AppBuilder/flask_appbuilder/security/manager.py/BaseSecurityManager.find_user--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/boto_elasticsearch_domain_test.py/BotoElasticsearchDomainTestCase.test_that_when_deleting_a_domain_fails_the_delete_domain_method_returns_false