itskp-odense/Backend/controller/updateUser.php

<?php

require "../../bootstrap.php";

use Backend\Model\User;

if(isset($_POST['id'])){
    $user = User::query()->find($_POST['id']);
    $user->name = $_POST['upName'];
    $newPass = password_hash($_POST['upPassword'], PASSWORD_DEFAULT);
    $user->password = $newPass;

    if($user->update()){
        return 1;
    }
}