Gulp for API Testing

gulpfile.js

var gulp = require('gulp');
var jsforce = require('jsforce');
var async = require('async');

gulp.task('force', function(){

  var conn = new jsforce.Connection();

  conn.login('<Salesforce Login Email>', '<Salesforce Password + Security Token>', function(err, userInfo) {
    if (err) console.error(err); 
    if(userInfo){
      console.log("User ID: " + userInfo.id);

      conn.sobject('Contact').find().execute(function(err, res){
        if(err) console.log(err);
        if(res){
          async.each(res, function(contact, asyncCB){
            console.log(contact);
            asyncCB();
          }, function(err){
            if(err){
              console.log(err);
            } else {
              console.log('done');
            }
          });
        }
      });
    }
  });
});

package.json

{
  "name": "gulp-force",
  "version": "0.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "async": "^0.9.0",
    "jsforce": "^1.3.1"
  },
  "devDependencies": {
    "gulp": "^3.8.11"
  }
}