itskp-odense/Backend/controller/createUser.php

<?php
//require our bootstrap file for database connection
session_start();
require "../../bootstrap.php";

use Backend\Model\User;

if(isset($_SESSION['permission'])){
    $user  = new User();
    $user->name = $_POST['name'];
    $hashPass = password_hash($_POST['password'], PASSWORD_DEFAULT);
    $user->password = $hashPass;

    if($user->save())
        echo $user->id;
}