1) Uncomend sdc_user in "project_app"/settings.py INSTALLED_APPS: (replace project_app by the app name of your project)
...
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'sdc_core',
    'sdc_tools',
    'sdc_user' # <--
]

2) Uncomend AUTH_USER_MODEL in "project_app"/settings.py INSTALLED_APPS: (replace project_app by the app name of your project)
...
AUTH_USER_MODEL = 'sdc_user.CustomUser'
...

3) Uncomend the import in sdc_core/consumer.py :
...
from sdc_user import sdc_views as sdc_user # <--
...

4) Uncomend the import in "project_app"/url.py: (replace project_app by the app name of your project)
...
urlpatterns = [
    path('sdc_view/sdc_tools/', include('sdc_tools.sdc_urls')),
    path('sdc_view/sdc_user/', include('sdc_user.sdc_urls')), # <--
    # scd view below
...

5)  Uncomend the import in sdc_core/static/index.organizerl.js:
...
import {} from "./sdc_tools/js/sdc_tools.organizer.js"
import {} from "./sdc_user/js/test_app_two.organizer.js" // <--
import {app} from './simpleDomControl/sdc_main.js';
...