const create = (request) => {
    return axios.post(link, body)
//  ^^^^^^--- return the chain
        .then((response) => Promise.all( // Wait for all promises we're about to create to resolve
           arr.map(obj => new Promise((resolve, reject) => { // What is `arr`?
                const file = fs.createWriteStream("./downloads/" + obj.name);
                https.get(obj.download_url, response => {
                     let stream = response.pipe(file);
                     stream
                         .on("finish", () => {
                             resolve(); // Resolve this download's result
                         })
                         .on(/*...presumably there's an error callbac*/, () => {
                             reject();
                         });
                });
            }));
        )
        .then(() => "Hi...."); // Final overall result
// Don't catch errors, leave that to the caller
};