Webhook avatar missing

const avatarURL = client.user.avatarURL({ format: 'png', size: 256 });

channel.createWebhook({ name: client.user.username, avatar: `${avatarURL}` }).then(webhook => {
    //
});

const avatarURL = client.user.avatarURL({ format: 'png', size: 256 });

channel.createWebhook({ name: client.user.username, avatar: `${avatarURL}` }).then(webhook => {
    //
});