Update Amazon Cognito dataset

AWS.config.region = 'us-east-1'; 
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
		    IdentityPoolId: 'us-east-1:123123123123123123123',
});

AWS.config.credentials.get(function() {

  var syncClient = new AWS.CognitoSyncManager();
  syncClient.openOrCreateDataset('myDataset', function(err, dataset) {	
  
    dataset.put('myKey', 'myValue' + Math.random(), function(err, record){
      dataset.synchronize({
        onSuccess: function(data, newRecords) {
           	console.log("successful");
        }
      });
    });
       
  });

});