{ Error: connect ECONNREFUSED 127.0.0.1:18332
at Object._errnoException (util.js:992:11)
at _exceptionWithHostPort (util.js:1014:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1186:14)
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '127.0.0.1',
port: 18332 }

testnet=1
      rpcuser=user
      rpcpassword=password
      rpcallowip=192.163.1.131

var bitcoin = require('bitcoin');
  var client = new bitcoin.Client({
  host: 'localhost',
  port: 1426,
  user: 'akshay',
  pass: 'kappsoft'

   });

 client.getDifficulty(function(err, difficulty) {
 if (err) {
  return console.error(err);
  }

 console.log('Difficulty: ' + difficulty);
 });