Stackoverflow uses OAuth 2.0
“Register For An App Key” at the Stack Exchange API site. Set your OAuth domain and application website settings.
Add the Client Id, Client Secret and API Key values in settings:
SOCIAL_AUTH_STACKOVERFLOW_KEY = ''
SOCIAL_AUTH_STACKOVERFLOW_SECRET = ''
SOCIAL_AUTH_STACKOVERFLOW_API_KEY = ''
You can ask for extra permissions with:
SOCIAL_AUTH_STACKOVERFLOW_SCOPE = [...]