TILAwsS3DirectoryUploadPrerequisites.kt

fun createS3DirectoryClient(accessKeyId: String, 
                            secretAccessKey: String, 
                            region: String): TransferManager {
    val awsCredentials = AWSStaticCredentialsProvider(BasicAWSCredentials(accessKeyId, secretAccessKey))

    val s3Client:AmazonS3 = AmazonS3ClientBuilder.standard()
            .withCredentials(awsCredentials)
            .withRegion(Regions.fromName(region))
            .build()
    
    return TransferManagerBuilder.standard()
            .withS3Client(s3Client)
            .build()
}