simple_sso user model error

Hello, I wanted to connect misago to an existing project.
I used a clean install, because my VDS does not support kvm and docker.

I used the instructions from here - misago-project.org/t/101-single-sign-on-sso-implementation/948/post/4325/

If I except urls.py if I don't touch misago, I get an error when going to the authorization page:
(and add 'simple_sso.sso_client' in INSTALLED_APPS)

But if I change settings.py :
AUTH_USER_MODEL = "misago_users.User"
To:
AUTH_USER_MODEL = "auth.User"
(And I added this, I don't know how critical):
AUTHENTICATION_BACKENDS = [
"misago.users.authbackends.MisagoBackend",
"django.contrib.auth.models.User", #<-this
]

Then I get the following error when restarting misago:

UPD on misago side urls.py

maybe I didn't follow these steps, because I didn't find where else SSO is enabled in missego

No, I couldn't find instructions on how to use it. But after joining the discord, I found in GIT a mention of "misago.sso" (which is not an application for INSTALLED_APPS)

I didn't see any SSO settings related to joining a django project(simple sso for example). Only Facebook,GitHub,Google,Twitter.

Just in case, I will explain in more detail, I do not need registration on the misago side. The thread I referred to mentioned login/registration.

Maybe git misago and git misago docker differ in components and I need to install the second one without docker?

I used the release of the main git 0.27(url below).Where should I download misago from to get SSO in settings?
github.com/rafalp/Misago