Use of the Graph PHP API (authentication and valid token recovery problems)

Describe the bug

Hi,
I've been going round in circles for several days and I can't find a way out. I'm not sure I've got the right direction yet.
I've come to ask you for advice and to help me with my code if that's what I'm looking for.
I develop in PHP using the msgraph-sdk-php SDK.
I'm developing a web application and I'd like to send tasks to To Do.
I'm working on the principle that the user will have to validate their consent the 1st time, and then the aim would be to stop asking them.
I would have recovered information such as token and token_refresh to redo actions the next time (stored in the database), at least that's what I think.

To create a task in To Do, I need to perform 2 actions for the user who has validated their consent:

• Read the task lists, and retrieve the task Id[0].
• Send the task and the information to this task[0]->id

I therefore turned to the ‘OnBehalfOfContext’ method with the idea of making several requests with tokens in the database for the user.

Expected behavior

Is it normal for my token not to be JWT?
Why doesn't it work?

$oboContext = new OnBehalfOfContext(
	$tenantId,
	$clientId,
	$clientSecret,
	$tokenAccess,
);
$graphClient = new GraphServiceClient($oboContext, $scopes);

How to reproduce

Test code extract (all in one)
test-event.php

	use League\OAuth2\Client\Provider\GenericProvider;
	use Microsoft\Kiota\Authentication\Oauth\OnBehalfOfContext;
	use Microsoft\Kiota\Abstractions\ApiException;
	use Microsoft\Graph\GraphServiceClient;
	use Microsoft\Graph\Generated\Models\TodoTask;
	use Microsoft\Graph\Generated\Models\DateTimeTimeZone;
	use Microsoft\Graph\Generated\Models\Importance;
	use Microsoft\Graph\Generated\Models\ItemBody;
	use Microsoft\Graph\Generated\Models\BodyType;

	session_start();
	session_regenerate_id();

	$tenantId = 'common';
	$clientId = '{clientId}';
	$clientSecret = '{clientSecretId}';
	$redirectUri = 'http://localhost/MS-Graph/test-event.php';
	$scopes = ['Tasks.ReadWrite', 'User.Read', 'offline_access'];
	$oauthClient = new GenericProvider([
		'clientId'                => $clientId,
		'clientSecret'            => $clientSecret,
		'redirectUri'             => $redirectUri,
		'urlAuthorize'            => "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/authorize",
		'urlAccessToken'          => "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token",
		'urlResourceOwnerDetails' => '',
		'scopes'                  => $scopes,
	]);
	if (!isset($_GET['code'])) {
		$authorizationUrl = $oauthClient->getAuthorizationUrl();
		header('Location: ' . $authorizationUrl);
		exit;
	}
	echo "<pre>";
	$authCode = $_GET['code'];
	$accessToken = $oauthClient->getAccessToken('authorization_code', [
		'code' => $authCode
	]);
	$tokenAccess = $accessToken->getToken();
	echo 'Access Token : ' . $tokenAccess . "<br>";
	echo 'Refresh Token : ' . $accessToken->getRefreshToken() . "<br>";
	echo 'Date d\'expiration : ' . date('d/m/Y H:i:s', $accessToken->getExpires()) . "<br>";
	echo 'Déjà expiré ? ' . ($accessToken->hasExpired() ? 'Oui' : 'Non') . "<br>";
	$oboContext = new OnBehalfOfContext(
		$tenantId,
		$clientId,
		$clientSecret,
		$tokenAccess,
	);
	$graphClient = new GraphServiceClient($oboContext, $scopes);
	try {
		$taskLists = $graphClient->me()->todo()->lists()->get()->wait()->getValue();
		foreach ($taskLists as $taskList) {
			echo 'Task List ID: ' . $taskList->getId() . ' - Title: ' . $taskList->getDisplayName() . PHP_EOL;
		}
		$task = new TodoTask();
		$task->setTitle("Nouvelle tâche OnBehalfOf");
        $dueDateTime = new DateTimeTimeZone();
        $dueDateTime->setDateTime('2024-10-25Z');
        $dueDateTime->setTimeZone('Europe/Paris');
        $task->setDueDateTime($dueDateTime);
        $task->setImportance(new Importance('normal'));
        $task->setIsReminderOn(true);
        $reminderDateTime = new DateTimeTimeZone();
        $reminderDateTime->setDateTime('2024-10-25T13:00:00Z');
        $reminderDateTime->setTimeZone('Europe/Paris');
        $task->setReminderDateTime($reminderDateTime);
		$body = new ItemBody();
        $body->setContent('Ceci est une tâche créée avec le flux OnBehalfOf');
        $body->setContentType(new BodyType('text'));
		$task->setBody($body);
		$graphClient->me()->todo()->lists()->byTodoTaskListId($taskLists[0]->getId())->tasks()->post($task)->wait();
		echo "Tâche créée avec succès.";
	} catch (ApiException $e) {
		echo "Echec de la création de la tâche : ".$ex->getError()->getMessage();
	}

SDK Version

2.17.0

Latest version known to work for scenario above?

No response

Known Workarounds

No response

Debug output

</details>


### Configuration

PHP 8.3

### Other information

_No response_