Deploying Ember JS to AWS using SSH , Rsync

[jinko]

I’ve managed to deploy a simple todo app unto AWS with S3 using this site

How to Deploy an Ember CLI app to Amazon S3 or a Linux box - Ember Igniter

However, when I attempt to do this ( Deploying with SSH and Rsync ) according to the tutorial, I run into the following error:

• gzipping **/*.{js,css,json,ico,map,xml,txt,svg,eot,ttf,woff,woff2}
• ignoring null
• assets/ember-user-app-d41d8cd98f00b204e9800998ecf8427e.css
• assets/vendor-d41d8cd98f00b204e9800998ecf8427e.css
• assets/ember-user-app-45a9825ab0116a8007bb48645b09f060.js
• crossdomain.xml
• robots.txt
• assets/vendor-d008595752c8e859a04200ceb9a77874.js
• gzipped 6 files ok | ± upload | | | ± rsync
• Uploading using rsync…

- Permission denied (publickey,gssapi-keyex,gssapi-with-mic). rsync: connection unexpectedly closed (0 bytes received so far) [sender] rsync error: unexplained error (code 255) at /BuildRoot/Library/Caches/com.apple.xbs/Sources/rsync/rsync-47/rsync/io.c(453) [sender=2.6.9]

The following is my config/deploy.js

module.exports = function(deployTarget) {
    var ENV = {
        build: {
        environment: deployTarget
    },

    's3-index': {
        accessKeyId: "<myKeyID>",
        secretAccessKey: "<mySecret>",
        bucket: "emberjsft",
        region: "ap-southeast-1",
        allowOverwrite: true
    },
    's3': {
        accessKeyId: "<myKeyID>",
        secretAccessKey: "<mySecret>",
        bucket: "emberjsft",
        region: "ap-southeast-1"
    },

    'ssh-index': {
        remoteDir: "/var/www/",
        username: "ec2-user",
        host: "ec2-<elastic-ip>.ap-southeast-1.compute.amazonaws.com",
        privateKeyFile: "/Users/imac/MY_AWS_PEMFILE.pem",
        allowOverwrite: true
    },
    rsync: {
        dest: "/var/www/",
        username: "ec2-user",
        host: "ec2-<elastic-ip>.ap-southeast-1.compute.amazonaws.com",
        delete: false
    }
    // include other plugin configuration that applies to all deploy targets here
    };

    if (deployTarget === 'development') {
        ENV.build.environment = 'development';
    // configure other plugins for development deploy target here
    }

    if (deployTarget === 'staging') {
        ENV.build.environment = 'production';
    // configure other plugins for staging deploy target here
    }

    if (deployTarget === 'production') {
        ENV.build.environment = 'production';
    // configure other plugins for production deploy target here
    }

    // Note: if you need to build some configuration asynchronously, you can return
    // a promise that resolves with the ENV object instead of returning the
    // ENV object synchronously.
    return ENV;
};

How should I resolve this issue?

Thanks