Nextcloud-App/lib/AppInfo/Application.php

<?php

namespace OCA\UPschooling\AppInfo;

use OCP\AppFramework\App;
use OCP\AppFramework\Bootstrap\IBootContext;
use OCP\AppFramework\Bootstrap\IBootstrap;
use OCP\AppFramework\Bootstrap\IRegistrationContext;

class Application extends App implements IBootstrap {
	public const APP_ID = 'upschooling';

	public function __construct() {
		parent::__construct(self::APP_ID);
	}

    public function register(IRegistrationContext $context): void
    {
        // Register the composer autoloader for packages shipped by this app, if applicable
        include_once __DIR__ . '/../../vendor/autoload.php';
    }

    public function boot(IBootContext $context): void
    {
        // nothing to boot?
    }
}