Hint for non-staff users on admin page refers wrong attribute for username.
|Sjoerd Job Postmus
|Patch needs improvement:
In commit 635ffc3c37d58eb96ae17d5389dd50bf635413c6 a block was introduced accessing
request.user.username, but it should be accessed using
request.user.get_username. This breaks on custom models which do not have a
username attribute or property.
(marking with Has patch, because I submitted one on github already).