将rds上的postgresql连接到节点js服务器

我正在尝试使用我的节点js服务器直接连接到我在AWS上的RDS实例（我的节点js服务器在ec2实例上运行）上的postgres数据库。 我很难find真正连接它的东西。 现在它不断打破我。

Here is my error: events.js:72 throw er; // Unhandled 'error' event ^ error: there is no parameter $0 at Connection.parseE (/home/ec2-user/Outfitr/Server/node_modules/pg/lib/connection.js:534:11) at Connection.parseMessage (/home/ec2-user/Outfitr/Server/node_modules/pg/lib/connection.js:361:17) at Socket.<anonymous> (/home/ec2-user/Outfitr/Server/node_modules/pg/lib/connection.js:105:22) at Socket.emit (events.js:95:17) at Socket.<anonymous> (_stream_readable.js:765:14) at Socket.emit (events.js:92:17) at emitReadable_ (_stream_readable.js:427:10) at emitReadable (_stream_readable.js:423:5) at readableAddChunk (_stream_readable.js:166:9) at Socket.Readable.push (_stream_readable.js:128:10) 

这里是我的代码试图连接的一切（与一些更无关的代码取出）：

 var AWS = require('aws-sdk') var pg = require("pg") var express = require("express") var app = express(); var gm = require("gm"); var fs = require("fs"); var async = require("async"); var bodyParser = require('body-parser'); var conString = "pg://MyDBUser:[e-mail]:5432/MyDB"; //var client = new pg.Client(conString); //client.connect(); //var Client = require('pg-native') var client = new pg.Client(conString); //client.connect(); client.connect(function(err) { if(err) throw err console.log('connected!') }) //var pg = require( 'pg' ).native; function create_user(username, password, firstname, lastname, gender, latitude, longitude, description, city, state_province, country, email, phone_number) { process.stdout.write("well we got here") pg.connect( conString, function( err,client) { client.query("INSERT INTO App_User(username, password, firstname, lastname, gender, latitude, longitude, description, city, state_province, country, email, phone_number) VALUES ($0,$1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)", [username, password, firstname, lastname, gender, latitude, longitude, description, city, state_province, country, email, phone_number]); }); }