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
19368	Custom User without username and with USERNAME_FIELD = 'email', but still see username error message at the admin login page	Val Neekman	nobody	"
Have a custom user with no username and have set USERNAME_FIELD = 'email'.
All works great, however, the error messages are still pointing to the username even though the custom user had no username field.

Here is where the error message comes from.
ERROR_MESSAGE = ugettext_lazy(""Please enter the correct username and password ""
        ""for a staff account. Note that both fields are case-sensitive."")"	Cleanup/optimization	closed	contrib.admin	1.5-alpha-1	Release blocker	fixed	custom user, USERNAME_FIELD, username		Ready for checkin	1	0	0	0	0	1