[1] Final: OpenID Connect Core 1.0 incorporating errata set 1 ( 版) <http://openid.net/specs/openid-connect-core-1_0.html#OfflineAccess>
[2] OpenID Connect (OAuth 2.0 for Login) - Google Accounts Authentication and Authorization — Google Developers ( 版) <https://developers.google.com/accounts/docs/OpenIDConnect#refresh-tokens>
[4] Using OAuth 2.0 for Web Server Applications - Google Accounts Authentication and Authorization — Google Developers ( 版) <https://developers.google.com/accounts/docs/OAuth2WebServer#offline>