Fix MultiViewDict error

test_oauth/views.py

@@ -26,7 +26,7 @@ def logout(request):
 def callback(request):
     token = (
         TESTOAuth2Session(state=request.session['oauth_state'])
-        .fetch_token(code=request.GET['code'])
+        .fetch_token(code=request.GET.get('code'))
     )
 
     user = auth.authenticate(token=token)