Amazon S3 region detection seems to be broken

[akozhemiakin]

First of all, my S3 region is not default (is not us-east-1).

I tried running command similar to this one:

app-builder.exe publish-s3 --bucket bucket-name --key test.txt --file "D:\test.txt"

and it fails with

AccessDenied: Access Denied status code: 403, request id: 0A932DFCA22D0A12, host id: sLVlhIFpvh7QQqaiPsjQeV9/Jli9sIk8c44X89eStgAkvXArYSsAKLLblZDnX8m8lSaZ9k/nm/s=
github.com/develar/app-builder/pkg/publisher.getBucketRegion       
/Volumes/data/Documents/app-builder/pkg/publisher/s3.go:99

However it runs ok when I explicitly specify correct --region option.

Also, to check if my creds are ok (btw I have permission s3:GetBucketLocation) I created sample script using aws nodejs sdk and it succesfully recieved region info.

I suspect, that it may be related to this part:

awsSession, err := session.NewSession(awsConfig, &aws.Config{
    // any region required
    Region:     aws.String("us-east-1"), // <---- is it really required?
    HTTPClient: httpClient,
})

... but I`m not sure.