def _update_token(self):
if not self._token_is_current():
body = {"username" : self._USERNAME,
"password" : HELPER.hash(self._PASSWORD, hexdigest=True)}
headers = STATE.get(self, self._HEADERS)
result = self._invoke_service(Services.UPDATE_TOKEN, headers, body, partition=False)
headers[self._TOKEN] = result["token"]
STATE.update(self, self._HEADERS, headers, mode="replace")
