gistfile1.diff

diff --git a/pgweb/account/admin.py b/pgweb/account/admin.py
index 09b51b4..beb1a01 100644
--- a/pgweb/account/admin.py
+++ b/pgweb/account/admin.py
@@ -1,4 +1,7 @@
 from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin
+from django.contrib.auth.forms import UserChangeForm
+from django.contrib.auth.models import User
 from django import forms
 
 import base64
@@ -23,5 +26,27 @@ class CommunityAuthSiteAdminForm(forms.ModelForm):
 class CommunityAuthSiteAdmin(admin.ModelAdmin):
 	form = CommunityAuthSiteAdminForm
 
-		
+class PGUserChangeForm(UserChangeForm):
+	"""just like UserChangeForm, butremoves "username" requirement"""
+	def __init__(self, *args, **kwargs):
+		super(PGUserChangeForm, self).__init__(*args, **kwargs)
+		# because the auth.User model is set to "blank=False" and the Django
+		# auth.UserChangeForm is setup as a ModelForm, it will always validate
+		# the "username" even though it is not present.  Thus the best way to
+		# avoid the validation is to remove the "username" field, if it exists
+		if self.fields.get('username'):
+			del self.fields['username']
+
+class PGUserAdmin(UserAdmin):
+	"""overrides default Django user admin"""
+	form = PGUserChangeForm
+
+	def get_readonly_fields(self, request, obj=None):
+		"""this prevents users from changing a username once created"""
+		if obj:
+			return self.readonly_fields + ('username',)
+		return self.readonly_fields
+
 admin.site.register(CommunityAuthSite, CommunityAuthSiteAdmin)
+admin.site.unregister(User) # have to unregister default User Admin...
+admin.site.register(User, PGUserAdmin) # ...in order to add overrides
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