Dispalying newly created users from last login

Dispalying newly created users from last login

I have installed the Members for Elgg 1.8 plugin in my Elgg application,
now I'm editing this plugin to display all the user that are created from
last admin login to current login.
but I'm not getting the expected results from the query that I have written.
Here is my index.php code
case 'lasttonow':
$db_prefix = elgg_get_config('dbprefix');
$joins = array("JOIN {$db_prefix}users_entity u on e.guid = u.guid");
$time = time();
$options['joins'] = $joins;
options['wheres'] = "e.time_created >= u.prev_last_login";
$options['order_by'] = "e.time_created DESC";
$content = elgg_list_entities_from_metadata($options);
break;
I'm not understanding where I'm doing mistake.
Thank You