Using IAM from Lambda Function fails

[KenEucker]

I've been wrestling with this for a while and have determined that the issue lies with this package. Here's the code I am using in a Lambda Function:

        var config = require("config.json");

	var AWS = require("aws-sdk");
	var gulp = require("gulp");
	var gulpS3Upload = require("gulp-s3-upload");
	var gulpS3 = gulpS3Upload(config.s3);
	var s3 = new AWS.S3(config.s3);

	var myBucket = "mycdnbucket";
	var myKey = "test/test.txt";

	await gulp
		.src("config.json")
		.pipe(
			gulpS3({
				Bucket: `${myBucket}/test`,
				ACL: "public-read",
			}, {
				maxRetries: 5
			})
		)
		.on("error", function (err) {
			console.log("S3 error", err);
		})
		.on("end", function () {
			console.log(
				`Files successfully uploaded to S3 to the path: /${myBucket}/${myKey}`
			);
		});

	return s3.putObject({
			Bucket: myBucket,
			Key: myKey,
			Body: "Hello world!"
		},
		function (err, data) {
			if (err) {
				console.log("error!", err);
			} else {
				console.log(`Successfully uploaded data to ${myBucket}/${myKey}`);
				console.log(data);
			}
		}
	);

The above code fails for the gulpS3 code, but succeeds with the aws-sdk code. Any help with determining the actual issue within the code would be appreciated. Here's the error stacktrace I am getting:

S3 error { [Error: S3 putObject Error: AccessDenied: Access Denied
at Request.extractError (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/services/s3.js:580:35)
at Request.callListeners (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:106:20)
at Request.emit (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:78:10)
at Request.emit (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:683:14)
at Request.transition (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:22:10)
at AcceptorStateMachine.runTo (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/state_machine.js:14:12)
at /var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/state_machine.js:26:10
at Request. (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:38:9)
at Request. (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:685:12)
at Request.callListeners (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:116:18)]
message: 'S3 putObject Error: AccessDenied: Access Denied\n at Request.extractError (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/services/s3.js:580:35)\n at Request.callListeners (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:106:20)\n at Request.emit (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:78:10)\n at Request.emit (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:683:14)\n at Request.transition (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:22:10)\n at AcceptorStateMachine.runTo (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/state_machine.js:14:12)\n at /var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/state_machine.js:26:10\n at Request. (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:38:9)\n at Request. (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/request.js:685:12)\n at Request.callListeners (/var/task/node_modules/gulp-s3-upload/node_modules/aws-sdk/lib/sequential_executor.js:116:18)',

[KenEucker]

After digging through the code, I feel like the issue lies around this line: https://github.com/clineamb/gulp-s3-upload/blob/master/index.js#L292

Where we see the config being set to empty, when it should at least have the value useIAM set to true, shouldn't it?

[KenEucker]

Bump.

Does anyone else have a working example of this package for use with IAM?