How to use count associated in ORM Cakephp 3.2?

Hi guys.I want to use two example Mark story in query.php in find count of comment and find count others.i mean this code
$query ->select(['total_comments_markstory' => $query->func()->count('')]) ->leftJoinWith('Comments.Users', function ($q) { return $q->where(['username' => 'markstory']); ) ->group(['']);

$query ->select(['total_comments_john' => $query->func()->count('')]) ->leftJoinWith('Comments.Users', function ($q) { return $q->where(['username' => 'john']); ) ->group(['']);

But this code find just john !. I am looking for run two of my queries.but it sounds just run last query.can you help me about this problem?.Thanks