def __init__(self, metadata=None):
        self.metadata = metadata or {}
Retrieve the authentication strategy for a specified URL.
dataset/ETHPy150Open openstack/python-neutronclient/neutronclient/common/serializer.py/Serializer.__init__--crossover with--dataset/ETHPy150Open sigmavirus24/requests-toolbelt/requests_toolbelt/auth/handler.py/AuthHandler.get_strategy_for