login and logout views for django

login_and_logout.py

# coding: utf-8
import django.contrib.auth as auth
from django.views.decorators.http import require_http_methods, require_GET, require_POST


@require_http_methods(['GET', 'POST'])
@ensure_csrf_cookie
def login(request):
    if request.method == 'GET':
        return render(request, "login.html")
    else:
        username = request.POST.get('username', None)
        password = request.POST.get('password', None)
        user = auth.authenticate(username=username, password=password)

        if not user:
            return render_json({'ret_code': 1})

        auth.login(request, user)
        return render_json({'ret_code': 0})


@require_GET
def logout(request):
    auth.logout(request.user)
    return redirect('/backend/')