old_contents: #!/usr/bin/env node
  'use strict';
  
  var express   = require('express'),
      Developer = require('./developer.js'),
      Iam       = require('./iam.js'),
      Sessions  = require('./sessions.js');
  
  
  var app = express();
  
  function generateResponse(key){
      return {
          Code: 'Success',
          LastUpdated: new Date().toISOString(),
          Type: 'AWS-HMAC',
          AccessKeyId: key.accessKey,
          SecretAccessKey: key.secretKey,
          Token: key.sessionToken,
          Expiration: new Date(key.expires).toISOString(),
          ALKSIsIAM: key.isIAM,
          ALKSAccount: key.alksAccount,
          ALKSRole: key.alksRole
      };
  }
  
  app.get('/latest/dynamic/instance-identity/document', function(req, resp){
     resp.end(JSON.stringify({
         region: 'us-east-1'
     }));
  });
  
  app.get(['/latest/meta-data/iam/security-credentials', '/latest/meta-data/iam/security-credentials'], (req, resp) => {
      resp.end('alks');
  });
  
  app.get('/latest/meta-data/iam/security-credentials/*', function(req, resp){
      Developer.getMetadata(function(err, metadata){
          if(metadata.isIAM){
              Iam.getIAMKey({}, null, metadata.alksAccount, metadata.alksRole, false, false, function(err, key){
                  resp.json(generateResponse(key));
              });
          }
          else{
              Sessions.getSessionKey({}, null, metadata.alksAccount, metadata.alksRole, false, false, false, function(err, key){
                  resp.json(generateResponse(key));
              });
          }
      });
  });
  
  app.listen(45000, '127.0.0.1', function(){
      console.log('Metadata server listening on port 45000');
  });
  
new_contents: #!/usr/bin/env node
  'use strict';
  
  var express   = require('express'),
      Developer = require('./developer.js'),
      Iam       = require('./iam.js'),
      Sessions  = require('./sessions.js');
  
  
  var app = express();
  
  function generateResponse(key){
      return {
          Code: 'Success',
          LastUpdated: new Date().toISOString(),
          Type: 'AWS-HMAC',
          AccessKeyId: key.accessKey,
          SecretAccessKey: key.secretKey,
          Token: key.sessionToken,
          Expiration: new Date(key.expires).toISOString(),
          ALKSIsIAM: key.isIAM,
          ALKSAccount: key.alksAccount,
          ALKSRole: key.alksRole
      };
  }
  
  app.get('/latest/dynamic/instance-identity/document', function(req, resp){
     resp.end(JSON.stringify({
         region: 'us-east-1'
     }));
  });
  
  app.get(['/latest/meta-data/iam/security-credentials', '/latest/meta-data/iam/security-credentials/'], (req, resp) => {
      resp.end('alks');
  });
  
  app.get('/latest/meta-data/iam/security-credentials/*', function(req, resp){
      Developer.getMetadata(function(err, metadata){
          if(metadata.isIAM){
              Iam.getIAMKey({}, null, metadata.alksAccount, metadata.alksRole, false, false, function(err, key){
                  resp.json(generateResponse(key));
              });
          }
          else{
              Sessions.getSessionKey({}, null, metadata.alksAccount, metadata.alksRole, false, false, false, function(err, key){
                  resp.json(generateResponse(key));
              });
          }
      });
  });
  
  app.listen(45000, '127.0.0.1', function(){
      console.log('Metadata server listening on port 45000');
  });
  
subject: Fix typo