@refresh_token.setter<EOL><INDENT>def refresh_token(self, refresh_token):<DEDENT>
self._refresh_token = refresh_token<EOL>
Sets the refresh_token of this ObtainTokenRequest.
A valid refresh token for generating a new OAuth access token. A valid refresh token is required if `grant_type` is set to `refresh_token` , to indicate the application wants a replacement for an expired OAuth access token.

:param refresh_token: The refresh_token of this ObtainTokenRequest.
:type: str