google/oauth2client — pull request #2 by lraccomando (2014-04-28 21:01:05+00:00)
Title: Added option to overwrite existing stored credentials.

Added an option to django_orm.Storage locked_put method to allow for overwriting an existing credential record rather than the creation of a new one.

I needed this functionality on a project I'm working on and ended up subclassing storage in order to achieve it. Thought it may be useful for others as well. The default behavior remains the same.