import requests

from allauth.socialaccount.providers.oauth2.views import (
    OAuth2Adapter,
    OAuth2CallbackView,
    OAuth2LoginView,
)

from .provider import StackExchangeProvider


class StackExchangeOAuth2Adapter(OAuth2Adapter):
    provider_id = StackExchangeProvider.id
    access_token_url = 'https://stackexchange.com/oauth/access_token'
    authorize_url = 'https://stackexchange.com/oauth'
    profile_url = 'https://api.stackexchange.com/2.1/me'

    def complete_login(self, request, app, token, **kwargs):
        provider = self.get_provider()
        site = provider.get_site()
        resp = requests.get(self.profile_url,
                            params={'access_token': token.token,
                                    'key': app.key,
                                    'site': site})
        extra_data = resp.json()['items'][0]
        return self.get_provider().sociallogin_from_response(request,
                                                             extra_data)


oauth2_login = OAuth2LoginView.adapter_view(StackExchangeOAuth2Adapter)
oauth2_callback = OAuth2CallbackView.adapter_view(StackExchangeOAuth2Adapter)

@@ -805,16 +805,48 @@
  site%7D)%0A
+        resp.raise_for_status()%0A
         

Check API response code