actions.js

    async function assignModerator({ _commit }, { roomId, userId }) {
        const res = await fetch(`${config.api.url}/rooms/${roomId}/moderators`, {
            method: 'POST',
            mode: 'cors',
            credentials: 'same-origin',
            body: JSON.stringify({ userId }),
        });

        const moderators = await res.json();

        return moderators;
    }