'WSGIRequest' объект имеет пользовательский атрибут '' админке Django

когда я пытаюсь получить доступ к странице администратора, это дает мне следующую ошибку:

System check identified no issues (0 silenced).
June 21, 2016 - 15:26:14
Django version 1.9.7, using settings 'librato_chart_sender_web.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Internal Server Error: /admin/
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 265, in wrapper
    return self.admin_view(view, cacheable)(*args, **kwargs)
  File "/Library/Python/2.7/site-packages/django/utils/decorators.py", line 149, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/django/views/decorators/cache.py", line 57, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 233, in inner
    if not self.has_permission(request):
  File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py", line 173, in has_permission
    return request.user.is_active and request.user.is_staff
AttributeError: 'WSGIRequest' object has no attribute 'user'
[21/Jun/2016 15:26:18] "GET /admin/ HTTP/1.1" 500 78473

Я совершенно новый в django ... но я следовал этому руководству:https://docs.djangoproject.com/en/1.9/ref/contrib/admin/

у меня нет пользовательских AdminSites и пользовательских AdminModels.

Я уже погуглил об этой проблеме, но все же я не могу решить ее для моего случая каким-либо образом. Вы можете помочь ?

вот мой settings.py:

"""
Django settings for librato_chart_sender_web project.

Generated by 'django-admin startproject' using Django 1.11.dev20160523235928.

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

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

import os

# 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/dev/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '*1@+=wzrqx^6z&@2@d8r(w$js+ktw45lv2skez(=kz+rwff_'

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

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'librato_chart_sender',
    'fontawesome',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'librato_chart_sender_web.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'librato_chart_sender/templates')],
        '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 = 'librato_chart_sender_web.wsgi.application'


# Database
# https://docs.djangoproject.com/en/dev/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}


# Password validation
# https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/dev/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'GMT'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/dev/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_DIRS = [
    ('css', 'librato_chart_sender/static/css'),
    ('js', 'librato_chart_sender/static/js'),
    ('fonts', 'librato_chart_sender/static/fonts'),
]

и admin.py:

from django.contrib import admin
from .models import Configuration

# Register your models here.

admin.site.register(Configuration)