// This is node-js pseudo code and won't work if you copy it 1:1

const body = {
    // grant_scope: ["foo", "bar"],
    // ...
    session: {
        id_token: {
            "foo": "bar"
        },
    }
}

fetch('<https://hydra/oauth2/auth/requests/consent/>' + challenge + '/accept', {
    method: 'PUT',
    body: JSON.stringify(body),
    headers: { 'Content-Type': 'application/json' }
}).
    // then(function (response) {