get creds for s3 bucket, closes #58
get creds for s3 bucket, closes #58

NUKnightLab/tarbell,eyeseast/tarbell,eads/tarbell,tarbell-project/tarbell,NUKnightLab/tarbell,NUKnightLab/tarbell,eads/tarbell,eyeseast/tarbell,tarbell-project/tarbell