security.authenticateUser(credentials, credentials);
if (updateMetrics.isEnabled())
updateMetrics.add(TabletServerUpdateMetrics.permissionErrors, 0);
UpdateSession us = new UpdateSession();
us.violations = new Violations();
us.credentials = credentials;
us.cenv = new TservConstraintEnv(security, us.credentials);
long sid = sessionManager.createSession(us, false);