def update(self, request, datum):
        pass
Returns two-tuple of (user, token) if authentication succeeds,
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/horizon/tables/actions.py/BaseAction.update--crossover with--dataset/ETHPy150Open jlafon/django-rest-framework-oauth/rest_framework_oauth/authentication.py/OAuthAuthentication.authenticate