admin.py

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin
from django.contrib.auth.models import User


class CustomUserAdmin(UserAdmin):
    def __init__(self, *args, **kwargs):
        super(UserAdmin, self).__init__(*args, **kwargs)
        UserAdmin.list_display += ('last_login',)


admin.site.unregister(User)
admin.site.register(User, CustomUserAdmin)