On April 20th 2015, Google will drop support for OpenID2, and all kunagi logins that depend on this will be broken.

As a work-around -- correct me if I'm wrong -- we should be able to open each affected user's xml file in `kunagi-data/entities/user` and remove the `<openId>` and `<password>` nodes, which will cause the user's account to be changed to a regular password login using kunagi's default password, "geheim".