username-rw.json

{
  "Version":"2012-10-17",
  "Statement": [
    {
      "Action": [
        "s3:*"
      ],
      "Effect": "Allow",
      "Resource": [
        "arn:aws:s3:::${aws:username}/*",
        "arn:aws:s3:::${aws:username}"
      ]
     }
  ]
}