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
28998	createsuperuser doesn't validate username provided via --username	Hasan Ramezani	Hasan Ramezani	"when I create the superuser with `--username` and the user already exists, command results in: 
`django.db.utils.IntegrityError: UNIQUE constraint failed: auth_user.username`
and there is no username uniqueness checking in this state. and same behavior when I create the superuser with `--username` and `--noinput`."	Bug	closed	contrib.auth	2.0	Normal	duplicate			Unreviewed	1	0	1	0	0	0