List<RolePrincipalGrant> roleGrantsList = getRolePrincipalGrants(roleMaps);
// all users by default belongs to public role
roleGrantsList.add(new RolePrincipalGrant(PUBLIC, request.getPrincipal_name(), request
.getPrincipal_type(), false, 0, null, null));
return new GetRoleGrantsForPrincipalResponse(roleGrantsList);
}