past3/cognito_auth_policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "mobileanalytics:PutEvents",
                "cognito-sync:*",
                "cognito-identity:*"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::past3"
            ],
            "Condition": {
                "StringLike": {
                    "s3:prefix": [
                        "${cognito-identity.amazonaws.com:sub}/"
                    ]
                }
            }
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:GetObjectAcl",
                "s3:PutObject",
                "s3:PutObjectAcl",
                "s3:DeleteObject"
            ],
            "Resource": [
                "arn:aws:s3:::past3/${cognito-identity.amazonaws.com:sub}",
                "arn:aws:s3:::past3/${cognito-identity.amazonaws.com:sub}/*"
            ]
        }
    ]
}