AttributeError at / 'WSGIRequest' object has no attribute 'user'

Olá pessoal, após criar a autenticação do usuário no Django, estou tendo o seguinte erro ao carregar a aplicação.

AttributeError at /
'WSGIRequest' object has no attribute 'user'

o meu código está assim:

settings.py

"""
Django settings for connectedin project.

Generated by 'django-admin startproject' using Django 1.9.1.

For more information on this file, see
https://docs.djangoproject.com/en/1.9/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.9/ref/settings/
"""

import os
import posixpath

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'f232c730-643c-4c4e-b22b-6ab5cc735838'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'app',
    # Add your apps here to enable them
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'perfis',
    'usuarios'
]

MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    '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',
]

ROOT_URLCONF = 'connectedin.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'connectedin.wsgi.application'

#código omitido
STATIC_URL = '/static/'

LOGIN_URL='/login/'
LOGOUT_URL='/logout/'
LOGIN_REDIRECT_URL='/'

#código omitido

views.py

from django.shortcuts import render, redirect
from django.http import HttpResponse
from perfis.models import Perfil, Convite
from django.contrib.auth.decorators import login_required

@login_required
def index(request):
    return render(request, 'index.html', { 'perfis' : Perfil.objects.all(), 
        'perfil_logado' : get_perfil_logado(request)})

@login_required
def perfis(request, perfil_id):

    perfil = Perfil.objects.get(id=perfil_id)
    perfil_logado = get_perfil_logado(request)
    ja_eh_contato = perfil in perfil_logado.contatos.all()
    return render(request, 'perfil.html', {'perfil' : perfil, 'perfil_logado' : get_perfil_logado(request), 
        'ja_eh_contato' : ja_eh_contato})

@login_required
def convidar(request, perfil_id):

    perfil_a_convidar = Perfil.objects.get(id=perfil_id)
    perfil_logado = get_perfil_logado(request)
    perfil_logado.convidar(perfil_a_convidar)

    return redirect('index')

@login_required
def aceitar(request, convite_id):
    convite = Convite.objects.get(id=convite_id)
    convite.aceitar()

    return redirect('index')

@login_required
def get_perfil_logado(request):
    return request.user.perfil

urls.py

from django.conf.urls import url
from usuarios.views import RegistrarUsuarioView
from django.contrib.auth import views as auth_views

import app.forms
import app.views

urlpatterns = [
    # Examples:
    url(r'^registrar/$', RegistrarUsuarioView.as_view(), name='registrar'),
    url(r'^login/$', auth_views.login, { 'template_name':'login.html' }, name='login'),
    url(r'^logout/$', auth_views.logout_then_login, {'login_url':'/login/'}, name='logout')

]

Já tentei pesquisar em algum fórum, alguma resolução, mas nada ainda, tentei realizar a alteração do nome do módulo de MIDDLEWARE_CLASSES, para MIDDLEWARE, e obtenho um outro erro,

django.core.exceptions.ImproperlyConfigured: WSGI application 'connectedin.wsgi. application' could not be loaded; Error importing module.

Se possível uma luz, pois não estou conseguindo resolver.