code: def _set_auth(self, user, password):
          
          if user is None or len(user.strip()) == 0:
              self._user = None
              self._password = None
              self._auth = None
          else:
              self._user = user.strip()
              if password:
                  self._password = password.strip()
                  try:
                      self._auth = aiohttp.BasicAuth(self._user, self._password, "utf-8")
                  except ValueError as e:
                      log.error(str(e))
              else:
                  self._password = None
                  self._auth = aiohttp.BasicAuth(self._user, "")
docs: Set authentication parameters