admin.py

from django.utils.translation import ugettext_lazy as _

class MyUserAdmin(UserAdmin):
    # The forms to add and change user instances
    form = UserChangeForm
    add_form = UserCreationForm

    # The fields to be used in displaying the User model.
    # These override the definitions on the base UserAdmin
    # that reference specific fields on auth.User.
    list_display = ('username', 'email', 'is_admin', 'is_active', 'aboutme', 'activation_key')
    list_filter = ('is_admin',)
    fieldsets = (
        (None, {'fields': ('username', 'password')}),
        (_('Personal info'), {'fields': ('email', 'aboutme', 'activation_key')}),
        (_('Permissions'), {'fields': ('is_admin', 'is_active')}),
    )
    # add_fieldsets is not a standard ModelAdmin attribute. UserAdmin
    # overrides get_fieldsets to use this attribute when creating a user.
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('username', 'email', 'password1', 'password2')}
        ),
    )
    search_fields = ('email', 'username')
    ordering = ('email', 'username')
    filter_horizontal = ()