Cannot access admin panel after setting up django-oauth-toolkit - django

Question

I had a pet-api (testing api) without authentication. I'm trying to learn how to implement oath2 to add security to my app.
I'd like to access the models of my app through a request call using
the API but also through the Django Admin Panel.
I'm following this tutorial: https://medium.com/#halfspring/guide-to-an-oauth2-api-with-django-6ba66a31d6d
for setting up: django-oauth-toolkit
Tutorial says I should add this code to settings:
AUTHENTICATION_BACKENDS = (
'django.contrib.auth.backends.ModelBackend' # To keep the Browsable API
'oauth2_provider.backends.OAuth2Backend',
)
But when I run server, and try to access /admin, I get:
ModuleNotFoundError at /admin/login/
No module named 'django.contrib.auth.backends.ModelBackendoauth2_provider'; 'django.contrib.auth.backends' is not a package
If I comment:
# 'django.contrib.auth.backends.ModelBackendoauth2_provider';
I can access the interface for the login, but says my user or password are wrong (they are not).
Commenting both lines I can access the admin panel without problems:
#AUTHENTICATION_BACKENDS = (
# 'django.contrib.auth.backends.ModelBackend' # To keep the Browsable API
# 'oauth2_provider.backends.OAuth2Backend',
#)

Answer 1

There is an error in code,
AUTHENTICATION_BACKENDS = (
'django.contrib.auth.backends.ModelBackend' # To keep the Browsable API
'oauth2_provider.backends.OAuth2Backend',
)
There is a comma (,) missing after 'django.contrib.auth.backends.ModelBackend' so it is taking both lines as single line, as you can see in the error.
So you needed to do just
AUTHENTICATION_BACKENDS = (
'django.contrib.auth.backends.ModelBackend', # To keep the Browsable API
'oauth2_provider.backends.OAuth2Backend',
)
Now it will work...

Answer 2

It's okay, mine is working good now without it. I am also following that guide. Just continue http://127.0.0.1:8000/o/applications.
BTW, I am also commenting the ALLOWED_HOSTS = ['0.0.0.0'] and on the users/views.py, I changed all the http://0.0.0.0:8000 to http://127.0.0.1:8000.
And I now get these:
{
"access_token": "C2qukd1zWz9aGSp652qbnpYjoT6ZRx",
"expires_in": 36000,
"token_type": "Bearer",
"scope": "read write",
"refresh_token": "UoI0r9J09F3kcXGO1q3KsYoGHQ9DBw"
}