firebase storage list files

listFiles.js

// listFiles.js
const gcs = require('@google-cloud/storage')({keyFilename: 'service-account-key.json'});

module.exports = function listFiles(request, response) {
    if(!request.body.uid) {
        response.status(422).send({error: "Missing UID"});
    }
    console.log("request.body.uid", request.body.uid);
    // Creates a client
    const bucketName = '<HIDDEN PROJECT ID>';
    const prefix = 'users/';
    // const prefix = `users/${request.body.uid}`;
    const delimiter = '/';
    const options = {
        prefix: prefix,
    };
    console.log("options: ", options);
    // if (delimiter) {
    //     options.delimiter = delimiter;
    // }

    
    // Lists files in the bucket, filtered by a prefix
    const bucket = gcs.bucket(bucketName);
    console.log("bucket: ", bucket);
    bucket
        .getFiles(options)
        .then(results => {
            const files = results[0];

            // console.log('Files:');
            // files.forEach(file => {
            //     console.log(file.name);
            // });
            response.send(files);
        })
        .catch(err => {
            console.error('ERROR:', err);
            response.status(400).send(err);
        });

}

// @ index.js
const functions = require('firebase-functions');
const listFiles = require('./list_files');
exports.listFiles = functions.https.onRequest(listFiles);