google/oauth2client — pull request #18 by jay0lee (2014-06-19 10:38:50+00:00)
Title: Support the login_hint parameter

Add support for setting the login_hint parameter which can simplify the authorization flow if the application knows the email address or domain the user should authenticate with. The parameter is defined at: https://developers.google.com/accounts/docs/OAuth2WebServer#formingtheurl