docs: def awsReadInstanceTag():
    """Print key from a running instance's metadata"""
    parser = argparse.ArgumentParser()
  
    parser.add_argument("--tag",
                        dest="tag",
                        required=True,
                        help="Which instance tag to read")
  
    cli = parser.parse_args()
    print haze.ec2.readMyEC2Tag(tagName=cli.tag)