models.py

from django.db import models
#from django.contrib.auth.models import User


class Users(models.Model):
    username = models.TextField()
    password = models.TextField()

views.py

from django.contrib.auth import authenticate, login
from django.http import HttpResponseRedirect

def login(request):
    username = request.POST['username']
    password = request.POST['password']
    user = authenticate(username=username,password=password)
    if user is not None:
        #check the level of the user and redirect to the website
        if user.is_active:
            return HttpResponseRedirect('index.html')
        else:
            print "error account"
    else:
        print "error acount login"