Count the total users and display the count in the table (Codeigniter) - codeigniter

Question

Newbie web developer here. My target is to get the total users under my agents and display the count in my table. I displayed my target for now for the better visualization of my target (1 and 7). Additionally, I provided a screenshot below for my target with explanation. Any help will be appreciated. Thank you in advance, everyone.
Views:
//I used ajax for my table
<script>
$(document).ready(function(){
// Tables
$(".allTable").on("click", function(){
var view_id = $(this).data('id')
$.ajax({
url: "<?=site_url('network/view')?>",
type: "post",
dataType: "json",
data: {
view_id: view_id
},
success: function(data){
var tbody ="";
var item =data.post;
for(var key in item) {
tbody +="<tr>";
tbody += "<td>"+item[key].userID+"</td>";
tbody += "<td>"+item[key].account_type+"</td>";
tbody += "<td>"+item[key].firstname+" "+item[key].lastname+"</td>";
tbody += "<td>"+item[key].email+"</td>";
tbody += "<td>"+item[key].mobile+"</td>";
tbody += "<td>"+item[key].username+"</td>";
tbody += "<td>"+item[key].currentPoints+"</td>";
tbody +="</tr>"
}
$(".tbody").html(tbody);
$('#editModal').modal('show');
}
});
})
});
</script>
Controller:
public function view()
{
if ($this->input->is_ajax_request()) {
$view_id = $this->input->post('view_id');
if ($post = $this->networks->view($view_id)) {
$data = array('responce' => 'success', 'post' => $post);
} else {
$data = array('responce' => 'error', 'message' => 'failed to fetch record', 'total_user_count => count($post)');
}
echo json_encode($data);
} else {
echo "No direct script access allowed";
}
}
Model:
// This is what i used for my query to get the agents under my agents. (Hierarchy Style)
public function view($userID = 0){
$this->db->select("*");
$this->db->from("users");
$this->db->where( "uuid=".$userID);
$query = $this->db->get();
return $result = $query->result();
}