media-storage/policies/api-policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": ["s3:ListAllMyBuckets"],
      "Resource": "*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:HeadBucket",
        "s3:ListBucket",
        "s3:PutObject",
        "s3:DeleteObject",
        "s3:GetBucketLocation",
        "s3:GetObject"
      ],
      "Resource": [
        "arn:aws:s3:::user-merch-images",
        "arn:aws:s3:::user-merch-images/*"
      ]
    }
  ]
}