FastNote

CODE:
var username = message.member.displayName;

infos.URGENTISTE.EFFECTIF = 1;
infos.URGENTISTE.SERVICES.username = new Date();

fs.writeFile("./infos.json", JSON.stringify(infos), (err) => console.error(err));


---------
OUTPUT:
{
    "URGENTISTE":{
        "EFFECTIF":1,
        "SERVICES":{
            "username":"2019-02-14T01:30:23.180Z"
        }
    }
}