React (newest) Server Left Join get all Results from 2. Table in first Query?

Hi, im new here.

I write a Picture Site with NodeJS and ReactJS. I have 2 Nodes. First Server, second Client. On the server, I retrieve the information from the database via the client. Lately, I’ve been having a bit of trouble grasping how to retrieve and process data.

module.exports = function (app, db) {
    const ut = require("./utils");

    /* GET PROFILE DATA */
    app.get("/account/:userID", async (req, res) => {
        var userID = req.params.userID;  // Get User-Hash from Client

        db.query(
            "SELECT * " +
            "FROM pix_users u " +
            "LEFT JOIN pix_images i ON i.user = u.user_hash " +
            "WHERE username=?",
            [userID],
            (err, result) => {
                if (err) {
                    res.send({ error: err });
                }

                if (result) {
                    var site_items = new Array();
                    result.forEach(function (value, index, items) {
                        site_items = site_item_model(value); 
                        console.log(site_items); 
                        // You can see all the results in the terminal.
                    });

                    return ut.handleResponse(req, res, 200, {
                        p_items: site_items,
                    });
                }
            },
        );
    });

    /* MODEL */
    function site_item_model(model) {

        return {
            id: model.id,
            username: model.username,
            userhash: model.user_hash,
            firstname: model.user_first_name,
            lastname: model.user_last_name,
            email: model.user_email,
            userpic: model.user_avatar_pic,
            userprefix: model.user_prefix,
            //useravatar: model.user_avatar,
            userjson: model.user_json,
            userregist: model.user_registered,
            // ------ Push Data from pix_images ------
            useruploads: {
                [model.id]: {
                    hash: model.image_hash,
                    file: model.file
                }
            }
            // ---------------------------------------

        };
    }
};

I have two tables: pix_user and pix_images. I want to retrieve the user record just once and use a LEFT JOIN to fetch all images belonging to that user. The database query works as expected. However, the model function only stores the last entry in useruploads, even though the user might have, for example, 10 images. What do I need to change so that all images are stored in useruploads?

Thanks !