How can i use the api call "onlineMeetings"

Question

here my json code can you tell me where im wrong ?

{
    "subject": "Sujet de la réunion",
    "startDateTime": "2023-10-18T10:00:00",
    "endDateTime": "2023-10-18T11:00:00",
    "participants": {
        "organizer": {
            "identity": {
                "user": {
                    "email": "adresse-email-de-l'organisateur@example.com"
                }
            }
        },
        "attendees": [
            {
                "identity": {
                    "user": {
                        "email": "adresse-email-du-premier-invite@example.com"
                    }
                }
            },
            {
                "identity": {
                    "user": {
                        "email": "adresse-email-du-deuxieme-invite@example.com"
                    }
                }
            }
        ]
    }
}