id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
14089	Username validation allows '@' character, while auth backend explicitly prevents this.	sam@…	nobody	"When editing users, the help_text for username states: ""Required. 30 characters or fewer. Letters, digits and @/./+/-/_ only.""
However, when trying to log in with a username that (thus validly) contains ""@"", you get the error ""Usernames cannot contain the '@' character."".

Of course, the login backend can be replaced with a custom one, but if using a non-existent username containing ""@"", you still get the contradictory error message.

I think the (useless) error message should be removed if the model allows ""@"".

"	Uncategorized	closed	contrib.auth	1.2	Normal	duplicate			Unreviewed	0	0	0	0	0	0