code: def add_information_about_person(self, session_info):
          
  
          session_info = dict(session_info)
          name_id = session_info["name_id"]
          issuer = session_info.pop("issuer")
          self.cache.set(name_id, issuer, session_info,
                         session_info["not_on_or_after"])
          return name_id
docs: If there already are information from this source in the cache
          this function will overwrite that information