Uploading Multiple Files To S3 Node - node.js

Question

I am trying to upload multiple files to S3 from my Sails.jsapplication. I've a Controller to handle the Request and a Service to upload should in case multiple controllers wants to utilize the function. The promise in the controller doesn't get resolved. And also, I keep getting this error Unhandled rejection TimeoutError: Missing credentials in config
Controller
multiSizeCreate: (req, res) => {
UploadService.uploadFile(req).then((data, failure) => {
if (failure) return [null];
return [Promise.resolve(AWSService.s3awsupload(data))];<-- <--The promise doesn't get resolved
})
.spread(uploadedData => {
if (!uploadedData) return ResponseService.json(403, res, 'File upload failed');
console.log(uploadedData); <--It logs an unresolved promise
return ResponseService.json(201, res, 'Size(s) created successfully');
})
.catch(err => ValidationService.jsonResolveError(err, Size, res))
}
AWSService
const AWS = require('aws-sdk');
const s3 = new AWS.S3();
const fs = require('fs');
const key = sails.config.settings.aws.key;
const secret = sails.config.settings.aws.secret;
const bucket = sails.config.settings.aws.bucket;
_ = require('lodash');
AWS.config.update({accessKeyId: key, secretAccessKey: secret});
const Promise = require('bluebird');
module.exports = {
s3awsupload: (files) => {
let toUpload = []
if (files.length > 0) {
_.forEach(files, file => {
toUpload.push(awsmainUpload(file));
});
return [toUpload];
} else {
return null;
}
}
}
const awsmainUpload = (fileDirectory) => {
const uploadImage = fs.createReadStream(fileDirectory.fd);
const fileName = Math.floor(Date.now() / 1000);
const params = {Bucket: bucket, Key: fileName + " " + fileDirectory.fileName, Body: uploadImage};
return new Promise((resolve, reject) => {
s3.upload(params, (error, outpout) => {
return error ? reject(error) : resolve(outpout);
})
})
}