If user declines social oauth, auth needs to logout

1. Click `$auth.loginWithRedirect()` button. 
2. Choose a Google social signup option.
3. Click decline 
4. User is returned back to app but next time they click login button it brings the user back to the social request page.

I believe if the URL has ?error=access_denied params then a $auth.logout() call needs to happen to allow the user to choose a different login method on Auth0