def login(self, username, password, *args, **kwargs):
        raise NotImplementedError
:param group_resource: optional filename for the group resource
dataset/ETHPy150Open reviewboard/rbtools/rbtools/api/transport/__init__.py/Transport.login--crossover with--dataset/ETHPy150Open dcos/dcos-cli/cli/dcoscli/marathon/main.py/_group_add