add graceful openid failures

Author: amleczko

CHANGES.txt

@@ -1,7 +1,7 @@
 1.7.5 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- openid fixes [amleczko]
 
 
 1.7.4 (2013-05-07)

por/dashboard/security/openid2.py

@@ -1,5 +1,6 @@
 from velruse.providers import google
 from velruse.exceptions import ThirdPartyFailure
+from velruse.exceptions import AuthenticationDenied
 from pyramid.httpexceptions import HTTPFound
 
 
@@ -48,3 +49,6 @@ def process(self, request):
             return super(RedturtleConsumer, self).process(request)
         except ThirdPartyFailure:
             raise HTTPFound(location='/')
+        except AuthenticationDenied:
+            request.add_message('Authentication from google has failed. Try again.', 'error')
+            raise HTTPFound(location='/')