FCM with Php and Admin-sdk. Shows firebase sdk class not found

I used composer to install firebase admin-sdk with command composer require kreait/firebase-php The resulting downloaded folder structure had

vendor/kreait/firebase-php , vendor/kreait/clock, vendor/kreait/firebase-tokens.

When I ran composer show kreait/firebase-php it did not list firebase-php under the require section. Instead kreait/firebase-tokens and kreait/clock was listed. the version for admin-sdk is 5.26.5. The vendor folder is in the root of my project folder. I added a test.php file with the following code.

require __DIR__ . '/vendor/autoload.php';

if (class_exists('Kreait\Firebase\Firebase')) {
    echo "Firebase class found!";
    $firebase = new \Kreait\Firebase\Firebase(); // Or your Firebase initialization code
} else {
    echo "Firebase class NOT found!";
} 

It outputs class not found. Output for php -v is

PHP 8.3.14 (cli) (built: Nov 19 2024 15:53:36) (NTS Visual C++ 2019 x64)
Copyright (c) The PHP Group
Zend Engine v4.3.14, Copyright (c) Zend Technologies

I next tried composer clear-cache composer install. Still it cannot find the sdk location when i run the test.php. There is something wrong with whatever being downloaded by the composer. The folder structure is not the way it should be. Please advise.

Ensure the correct class is being referenced. use Kreait\Firebase\Factory to initialize Firebase. Modify your code like this:

require __DIR__ . '/vendor/autoload.php';
use Kreait\Firebase\Factory;
$firebase = (new Factory)->create();
echo "Firebase initialized!";

check that the composer.json file lists the package correctly and try clearing the Composer cache