I want to get the image file from S3 in node.js, but I get a Forbidden 403 error in s3.getObject.

getImage:function(req,res){
    var fileName = req.param('filename');
    sails.log.info('fileName='+fileName);
    vars3 = new AWS.S3({
        region: 'ap-northeast-1'
    });

    vars3Params = {
        bucket —The bucket name obtained from the constant,
        Key—fileName
    };
    s3.getObject(s3Params, function(err,data){
        if(err===null){
            sails.log.info('ok!');
            res.send(data.Body);
        } else{
            sails.log.error('err='+err.message);
            res.status(500).send(err);
        }
    });
},

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowReading",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::xxxxxxxxxxx:user/myusername"
            },
            "Action"Action"]
                "s3:GetObject"
            ],
            "Resource": [
                "arn:aws:s3::bucketName",
                "arn:aws:s3::bucketName/*"
            ]
        }
    ]
}