@expires_at.setter<EOL><INDENT>def expires_at(self, expires_at):<DEDENT>
self._expires_at = expires_at<EOL>
Sets the expires_at of this ObtainTokenResponse.
The date when access_token expires, in [ISO 8601](http://www.iso.org/iso/home/standards/iso8601.htm) format.

:param expires_at: The expires_at of this ObtainTokenResponse.
:type: str