Game-Jaming/Backend/Controllers/Group/UpdateGruop.php

<?php
require_once "../../../bootstrap.php";
require_once "Group.php";

use Backend\Models\Group;

if(isLogin()){
    if (isset($_POST['updateGroup'])) {
        if($group = groupViaToken($_SESSION['token'])){
                $group->group_name = $_POST['groupName'];
                $group->group_amount = $_POST['groupAmount'];
                $group->game_jam_id = $_POST['gameJamId'];
                if(!$group->save()){
                    http_response_code(500);
                }else{
                    http_response_code(201);
                }
        }
    }else{
        http_response_code(400);
    }
}else{
    http_response_code(401);
}