Settings.py:

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'fwdeveryone',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

#Authentication backends
AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
)

Views.py:

from __future__ import print_function
from __future__ import unicode_literals
from __future__ import division
from __future__ import absolute_import

from django.shortcuts import get_object_or_404
from django.http import HttpResponseRedirect, HttpResponse
from django.core.urlresolvers import reverse
from django.template import RequestContext
from django.contrib.auth import authenticate, logout
from django.contrib.auth import login as auth_login
from django.contrib.auth import get_user_model
from django.contrib.auth.models import User

def signup(request):
    if request.method == 'POST':
        username = request.POST['username']
        email = request.POST['email']
        password = request.POST['password']

        user = MyUser.objects.create_user(username, email, password)
        user.save()

    user = authenticate(username=username, password=password) #Always returns none