I'm trying to save a document in mongodb collection and want to wait for it finish before the JavaScript executes next instruction but the await is not waiting

const properties = ["name", "description", "type", "permission", "color"];

const addEvent = async (eventInfo, api_call = true) => {
    let response = { success: true };

    for (let prop of properties) {
        if (prop !== "permission" && !eventInfo.hasOwnProperty(prop)) {
            response.success = false;
            response.message = prop + " field is not given.";
            break;
        }
    }

    if (response.success) {
        let event = new Event(eventInfo);

        await event.save((err) => {
            if (err) {
                response.success = false;
                response.message = err.message;
                console.log(response);
            } else {
                response.success = true;
                response.message = "Event Added.";
            }
        });

        console.log(response);
    }

    if (api_call) {
        return new Promise((resolve, reject) => {
            response.success ? resolve(response) : reject(response);
        });
    }
};