def __repr__(self):
        return str(self)
Returns a list of creds who's gid caller matches the 
dataset/ETHPy150Open pydata/pandas/pandas/core/base.py/StringMixin.__repr__--crossover with--dataset/ETHPy150Open fp7-ofelia/ocf/ofam/src/src/foam/sfa/trust/auth.py/Auth.filter_creds_by_caller