'If there already are information from this source in the cache
this function will overwrite that information'

def add_information_about_person(self, session_info):

    name_id = session_info['name_id']
    issuer = session_info['issuer']
    del session_info['issuer']
    self.cache.set(name_id, issuer, session_info, session_info['not_on_or_after'])
    return name_id
