php-opencloud login with Identity V3

login.php

<?php
/**
 * Login with php-opencloud and Identity v3 is really badly explained.
 *
 * Here is a bit of code that allows you to easily connect to your OpenStack using Keystone (Identity) v3
 */

use OpenStack\ObjectStore\v1\Service;
use OpenStack\OpenStack;
use Psr\Log\LoggerInterface;

/**
 * Class StorageManager
 * @package App\Service
 */
class StorageManager
{
    /**
     * @var OpenStack
     */
    private $openStack
    /**
     * @var Service
     */
    private $storageObject;

    /**
     * StorageManager constructor.
     * @param string $endpoint
     * @param string $user
     * @param string $password
     * @param string $tenantId
     * @param string $region
     * @param string $environment
     * @param LoggerInterface $logger
     * @throws \Exception
     */
    public function __construct(string $endpoint, string $user, string $password, string $tenantId, string $region,
                                string $environment, LoggerInterface $logger)
    {
        $this->openStack = new OpenStack([
            'authUrl' => $endpoint, // For example, for OVH, it's https://auth.cloud.ovh.net/v3
            'type' => 'password', // We're using a password, not a token
            'user' => [
                'id' => 'Project name', // A random sting.  I've put my project name
                'name' => $user, // Openstack user name
                'password' => $password, // Openstack password
                'domain' => ['id' => 'default']
            ],
            'scope' => [
                'project' => [
                    'id' => $tenantId // Your tenant ID
                ]
            ],
            'region' => $region // Your region, if needed (ex: SBG3 or GRA5)
        ]);

        // That's all, it's working!
        $this->storageObject = $this->openStack->objectStoreV1();
    }
}