diff --git a/app.js b/app.js
index bac9298..0d05a98 100644
--- a/app.js
+++ b/app.js
@@ -1,167 +1,181 @@
-'use strict';
+'use strict'
 
-require('dotenv').config();
+require('dotenv').config()
 
 /**
  * Require the dependencies
  * @type {*|createApplication}
  */
-var express = require('express');
-var app = express();
-var path = require('path');
-var OAuthClient = require('intuit-oauth');
-var bodyParser = require('body-parser');
-var ngrok =  (process.env.NGROK_ENABLED==="true") ? require('ngrok'):null;
-
+var express = require('express')
+var app = express()
+var path = require('path')
+var OAuthClient = require('intuit-oauth')
+var bodyParser = require('body-parser')
+var ngrok = process.env.NGROK_ENABLED === 'true' ? require('ngrok') : null
 
 /**
  * Configure View and Handlebars
  */
-app.use(bodyParser.urlencoded({extended: true}));
-app.use(express.static(path.join(__dirname, '/public')));
-app.engine('html', require('ejs').renderFile);
-app.set('view engine', 'html');
+app.use(bodyParser.urlencoded({ extended: true }))
+app.use(express.static(path.join(__dirname, '/public')))
+app.engine('html', require('ejs').renderFile)
+app.set('view engine', 'html')
 app.use(bodyParser.json())
 
-var urlencodedParser = bodyParser.urlencoded({ extended: false });
+var urlencodedParser = bodyParser.urlencoded({ extended: false })
 
 /**
  * App Variables
  * @type {null}
  */
 var oauth2_token_json = null,
-    redirectUri = '';
-
+  redirectUri = ''
 
 /**
  * Instantiate new Client
  * @type {OAuthClient}
  */
 
-var oauthClient = null;
-
+var oauthClient = null
 
 /**
  * Home Route
  */
-app.get('/', function(req, res) {
-
-    res.render('index');
-});
+app.get('/', function (req, res) {
+  res.render('index')
+})
 
 /**
  * Get the AuthorizeUri
  */
-app.get('/authUri', urlencodedParser, function(req,res) {
-
-    oauthClient = new OAuthClient({
-        clientId: req.query.json.clientId,
-        clientSecret: req.query.json.clientSecret,
-        environment: req.query.json.environment,
-        redirectUri: req.query.json.redirectUri
-    });
-
-    var authUri = oauthClient.authorizeUri({scope:[OAuthClient.scopes.Accounting],state:'intuit-test'});
-    res.send(authUri);
-});
-
+app.get('/authUri', urlencodedParser, function (req, res) {
+  oauthClient = new OAuthClient({
+    clientId: req.query.json.clientId,
+    clientSecret: req.query.json.clientSecret,
+    environment: req.query.json.environment,
+    redirectUri: req.query.json.redirectUri,
+  })
+
+  var authUri = oauthClient.authorizeUri({
+    scope: [OAuthClient.scopes.Accounting],
+    state: 'intuit-test',
+  })
+  res.send(authUri)
+})
 
 /**
  * Handle the callback to extract the `Auth Code` and exchange them for `Bearer-Tokens`
  */
-app.get('/callback', function(req, res) {
-
-    oauthClient.createToken(req.url)
-       .then(function(authResponse) {
-             oauth2_token_json = JSON.stringify(authResponse.getJson(), null,2);
-         })
-        .catch(function(e) {
-             console.error(e);
-         });
-
-    res.send('');
-
-});
+app.get('/callback', function (req, res) {
+  oauthClient
+    .createToken(req.url)
+    .then(function (authResponse) {
+      oauth2_token_json = JSON.stringify(authResponse.getJson(), null, 2)
+    })
+    .catch(function (e) {
+      console.error(e)
+    })
+
+  res.send('')
+})
 
 /**
  * Display the token : CAUTION : JUST for sample purposes
  */
-app.get('/retrieveToken', function(req, res) {
-    res.send(oauth2_token_json);
-});
-
+app.get('/retrieveToken', function (req, res) {
+  res.send(oauth2_token_json)
+})
 
 /**
  * Refresh the access-token
  */
-app.get('/refreshAccessToken', function(req,res){
-
-    oauthClient.refresh()
-        .then(function(authResponse){
-            console.log('The Refresh Token is  '+ JSON.stringify(authResponse.getJson()));
-            oauth2_token_json = JSON.stringify(authResponse.getJson(), null,2);
-            res.send(oauth2_token_json);
-        })
-        .catch(function(e) {
-            console.error(e);
-        });
-
-
-});
+app.get('/refreshAccessToken', function (req, res) {
+  oauthClient
+    .refresh()
+    .then(function (authResponse) {
+      console.log(
+        'The Refresh Token is  ' + JSON.stringify(authResponse.getJson())
+      )
+      oauth2_token_json = JSON.stringify(authResponse.getJson(), null, 2)
+      res.send(oauth2_token_json)
+    })
+    .catch(function (e) {
+      console.error(e)
+    })
+})
 
 /**
  * getCompanyInfo ()
  */
-app.get('/getCompanyInfo', function(req,res){
-
-
-    var companyID = oauthClient.getToken().realmId;
-
-    var url = oauthClient.environment == 'sandbox' ? OAuthClient.environment.sandbox : OAuthClient.environment.production ;
-
-    oauthClient.makeApiCall({url: url + 'v3/company/' + companyID +'/companyinfo/' + companyID})
-        .then(function(authResponse){
-            console.log("The response for API call is :"+JSON.stringify(authResponse));
-            res.send(JSON.parse(authResponse.text()));
-        })
-        .catch(function(e) {
-            console.error(e);
-        });
-});
-
+app.get('/getCompanyInfo', function (req, res) {
+  var companyID = oauthClient.getToken().realmId
+
+  var url =
+    oauthClient.environment == 'sandbox'
+      ? OAuthClient.environment.sandbox
+      : OAuthClient.environment.production
+
+  oauthClient
+    .makeApiCall({
+      url: url + 'v3/company/' + companyID + '/companyinfo/' + companyID,
+    })
+    .then(function (authResponse) {
+      console.log(
+        'The response for API call is :' + JSON.stringify(authResponse)
+      )
+      res.send(JSON.parse(authResponse.text()))
+    })
+    .catch(function (e) {
+      console.error(e)
+    })
+})
 
 /**
  * Start server on HTTP (will use ngrok for HTTPS forwarding)
  */
 const server = app.listen(process.env.PORT || 8000, () => {
-    console.log(`💻 Server listening on port ${server.address().port}`);
-if(!ngrok){
-    redirectUri = `${server.address().port}` + '/callback';
-    console.log(`💳  See the Sample App in your browser : ` + 'http://localhost:' + `${server.address().port}`);
-    console.log(`💳  Copy this into Redirect URI on the browser : ` + 'http://localhost:' + `${server.address().port}` + '/callback');
-    console.log(`💻  Make Sure this redirect URI is also copied on your app in : https://developer.intuit.com`);
-}
-
-});
+  console.log(`💻 Server listening on port ${server.address().port}`)
+  if (!ngrok) {
+    redirectUri = `${server.address().port}` + '/callback'
+    console.log(
+      `💳  See the Sample App in your browser : ` +
+        'http://localhost:' +
+        `${server.address().port}`
+    )
+    console.log(
+      `💳  Copy this into Redirect URI on the browser : ` +
+        'http://localhost:' +
+        `${server.address().port}` +
+        '/callback'
+    )
+    console.log(
+      `💻  Make Sure this redirect URI is also copied on your app in : https://developer.intuit.com`
+    )
+  }
+})
 
 /**
  * Optional : If NGROK is enabled
  */
 if (ngrok) {
-
-    console.log("NGROK Enabled");
-    ngrok.connect({addr: process.env.PORT || 8000}, (err, url) => {
-            if (err) {
-                process.exit(1);
-            }
-            else {
-                redirectUri = url + '/callback';
-                console.log(`💳  See the Sample App in your browser: ${url}`);
-                console.log(`💳  Copy and paste this Redirect URI on the browser :  ${redirectUri}`);
-                console.log(`💻  Make Sure this redirect URI is also copied on your app in : https://developer.intuit.com`);
-
-            }
-        }
-    );
+  console.log('NGROK Enabled')
+
+  const getURL = async () => {
+    const url = await ngrok.connect({ addr: process.env.PORT || 8000 })
+
+    if (!url) {
+      process.exit(1)
+    }
+
+    redirectUri = url + '/callback'
+    console.log(`💳  See the Sample App in your browser: ${url}`)
+    console.log(
+      `💳  Copy and paste this Redirect URI on the browser :  ${redirectUri}`
+    )
+    console.log(
+      `💻  Make Sure this redirect URI is also copied on your app in : https://developer.intuit.com`
+    )
+  }
+
+  getURL()
 }
-
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..6c33a1c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1496 @@
+{
+  "name": "OAuth2.0-demo-nodejs",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@dabh/diagnostics": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@dabh/diagnostics/-/diagnostics-2.0.2.tgz",
+      "integrity": "sha512-+A1YivoVDNNVCdfozHSR8v/jyuuLTMXwjWuxPFlFlUapXoGc+Gj9mDlTDDfrwl7rXCl2tNZ0kE8sIBO6YOn96Q==",
+      "requires": {
+        "colorspace": "1.1.x",
+        "enabled": "2.0.x",
+        "kuler": "^2.0.0"
+      }
+    },
+    "@types/caseless": {
+      "version": "0.12.2",
+      "resolved": "https://registry.npmjs.org/@types/caseless/-/caseless-0.12.2.tgz",
+      "integrity": "sha512-6ckxMjBBD8URvjB6J3NcnuAn5Pkl7t3TizAg+xdlzzQGSPSmBcXf8KoIH0ua/i+tio+ZRUHEXp0HEmvaR4kt0w=="
+    },
+    "@types/concat-stream": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@types/concat-stream/-/concat-stream-1.6.0.tgz",
+      "integrity": "sha1-OU2+C7X+5Gs42JZzXoto7yOQ0A0=",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/form-data": {
+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/@types/form-data/-/form-data-0.0.33.tgz",
+      "integrity": "sha1-yayFsqX9GENbjIXZ7LUObWyJP/g=",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/methods": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/methods/-/methods-1.1.1.tgz",
+      "integrity": "sha512-hvD1Yz0xugpvbFNVihc0Eu60Y/o1dD8LmSdN4d5QHV315ljuVGlwS5DYrb3RqFi6JskDC0Xi6/Bv6aEe/1A9bw=="
+    },
+    "@types/node": {
+      "version": "14.6.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.6.0.tgz",
+      "integrity": "sha512-mikldZQitV94akrc4sCcSjtJfsTKt4p+e/s0AGscVA6XArQ9kFclP+ZiYUMnq987rc6QlYxXv/EivqlfSLxpKA=="
+    },
+    "@types/request": {
+      "version": "2.48.5",
+      "resolved": "https://registry.npmjs.org/@types/request/-/request-2.48.5.tgz",
+      "integrity": "sha512-/LO7xRVnL3DxJ1WkPGDQrp4VTV1reX9RkC85mJ+Qzykj2Bdw+mG15aAfDahc76HtknjzE16SX/Yddn6MxVbmGQ==",
+      "requires": {
+        "@types/caseless": "*",
+        "@types/node": "*",
+        "@types/tough-cookie": "*",
+        "form-data": "^2.5.0"
+      }
+    },
+    "@types/tough-cookie": {
+      "version": "2.3.7",
+      "resolved": "https://registry.npmjs.org/@types/tough-cookie/-/tough-cookie-2.3.7.tgz",
+      "integrity": "sha512-rMQbgMGxnLsdn8e9aPVyuN+zMQLrZ2QW8xlv7eWS1mydfGXN+tsTKffcIzd8rGCcLdmi3xvQw2MDaZI1bBNTaw=="
+    },
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
+    },
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "ajv": {
+      "version": "6.12.4",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.4.tgz",
+      "integrity": "sha512-eienB2c9qVQs2KWexhkrdMLVDoIQCz5KSeLxwg9Lzk4DOfBtIK9PQwwufcsn1jjGuf9WZmqPMbGxOzfcuphJCQ==",
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "dependencies": {
+        "uri-js": {
+          "version": "4.2.2",
+          "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
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+          "requires": {
+            "punycode": "^2.1.0"
+          }
+        }
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
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+      }
+    },
+    "assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
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+    "async": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.0.tgz",
+      "integrity": "sha512-TR2mEZFVOj2pLStYxLht7TyfuRzaydfpxr3k9RpHIzMgw7A64dzsdqCxH1WJyQdoe8T10nDXd9wnEigmiuHIZw=="
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+    },
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+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg=="
+    },
+    "aws-sign2": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
+    },
+    "aws4": {
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.10.1.tgz",
+      "integrity": "sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA=="
+    },
+    "base64-js": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
+      "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
+    },
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
+      "requires": {
+        "tweetnacl": "^0.14.3"
+      }
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+    "binary": {
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+      "integrity": "sha1-n2BVO8XOjDOG87VTz/R0Yq3sqnk=",
+      "requires": {
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+        "chainsaw": "~0.1.0"
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+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
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+    "buffer-equal-constant-time": {
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+      "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
+      "integrity": "sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk="
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+    },
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+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
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+      "resolved": "https://registry.npmjs.org/chainsaw/-/chainsaw-0.1.0.tgz",
+      "integrity": "sha1-XqtQsor+WAdNDVgpE4iCi15fvJg=",
+      "requires": {
+        "traverse": ">=0.3.0 <0.4"
+      }
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+    "color": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/color/-/color-3.0.0.tgz",
+      "integrity": "sha512-jCpd5+s0s0t7p3pHQKpnJ0TpQKKdleP71LWcA0aqiljpiuAkOSUFN/dyH8ZwF0hRmFlrIuRhufds1QyEP9EB+w==",
+      "requires": {
+        "color-convert": "^1.9.1",
+        "color-string": "^1.5.2"
+      }
+    },
+    "color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "requires": {
+        "color-name": "1.1.3"
+      }
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+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
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+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
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+        "extsprintf": "^1.2.0"
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+      "resolved": "https://registry.npmjs.org/winston/-/winston-3.3.3.tgz",
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+        "winston-transport": "^4.4.0"
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+    "winston-transport": {
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+      "resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.4.0.tgz",
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+}
diff --git a/package.json b/package.json
index 8e08b7c..69ca33b 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "express": "^4.14.0",
     "express-session": "^1.14.2",
     "intuit-oauth": "^1.2.0",
-    "ngrok": "^2.2.9",
+    "ngrok": "^3.2.7",
     "path": "^0.12.7"
   }
 }