Access the storage from a function

export default async ({ res, req, log, error }: Context) => {
    if (!APPWRITE_PROJECT_ID || !APPWRITE_BUCKET_ID || !APPWRITE_API_ENDPOINT || !APPWRITE_API_KEY) {
        error(
            "Please make sure you have environment variables set.",
        );
        return;
    }
    const client = new Client()
        .setEndpoint(APPWRITE_API_ENDPOINT) // Your API Endpoint
        .setProject(APPWRITE_PROJECT_ID)
        .setKey(APPWRITE_API_KEY);

  const bucket = new Storage(client);

  const fileId =  req.path.replace(/^(\/)|(\/)$/g, '');
    log("FILE ID: " + fileId);
    log("BUCKET ID: " + APPWRITE_BUCKET_ID);
    if(req.method === 'GET') {
        try {
            const file = await bucket.getFileDownload(APPWRITE_BUCKET_ID,  fileId);
            return res.send(file, 200);
        } catch (err) {
            error(err.message)
            return res.json({ error: err.message }, 500);
        }
        
    }
};