'The /login form.  No link to this page exists any more on
the site (all actions invoking it now go through the login
cover).  However, this page is still used for logging the user
in during submission or voting from the bookmarklets.'

@validate(dest=VDestination())
def GET_login(self, dest):

    if (c.user_is_loggedin and (not (request.environ.get('extension') == 'embed'))):
        return self.redirect(dest)
    return LoginPage(dest=dest).render()
