def assert_credentials_are_valid(self, parameters):
    raise NotImplementedError
args:
dataset/ETHPy150Open AppScale/appscale-tools/lib/agents/base_agent.py/BaseAgent.assert_credentials_are_valid--crossover with--dataset/ETHPy150Open polaris-gslb/polaris-gslb/polaris_health/state/pool.py/PoolMember.__init__