docs: def registration_authority_entity_id(self):
          """
          Some entities return the register entity id,
          but other do not. Unsure if this is a bug or
          inconsistently registered data.
          """
  
          if ATTR_ENTITY_REGISTRATION_AUTHORITY in self.raw:
              try:
                  return self.raw[
                      ATTR_ENTITY_REGISTRATION_AUTHORITY][
                      ATTR_ENTITY_REGISTRATION_AUTHORITY_ENTITY_ID][
                      ATTR_DOLLAR_SIGN]
              except KeyError:
                  pass