CanvasApiTool.php

<?php
 
namespace ceLTIc\LTI\ApiHook\canvas;
 
use ceLTIc\LTI\ApiHook\ApiTool;
 
class CanvasApiTool extends ApiTool
{
 
    public function getUserId()
    {
        $userId = '';
        $messageParameters = $this->tool->getMessageParameters(true, true, false);
        if (isset($messageParameters['custom_canvas_user_id'])) {
            $userId = trim($messageParameters['custom_canvas_user_id']);
        }
 
        return $userId;
    }
 
}