@abstractmethod
    def is_simple_authn(self):
Sort Series with MultiIndex by chosen level. Data will be
dataset/ETHPy150Open weblabdeusto/weblabdeusto/server/src/weblab/core/login/simple/__init__.py/UserAuth.is_simple_authn--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/core/series.py/Series.sortlevel