I am following https://pypi.org/project/djangorestframework-sso/ tutorial for sso authentication in django, In first step they added 'rest_framework_sso' in INSTALLED_APPSin settings.py without installing any such library. When I tried to do the same I got: ModuleNotFoundError: No module named 'rest_framework_sso' Then I tried pip/pip3 install 'rest_framework_sso' but I got: ERROR: Could not find a version that satisfies the requirement rest_framework_sso (from versions: none) ERROR: No matching distribution found for rest_framework_sso Then I installed django rest framework but it still is not working. I want to know why is it not working and how can I solve this, I didn't find anything that can help me related to this. Continue reading...