diff --git a/engine.js b/engine.js
index 71ac98a..dcc0078 100755
--- a/engine.js
+++ b/engine.js
@@ -1,69 +1,75 @@
-var RC = require('ringcentral')
-require('dotenv').load()
+//var RC = require('ringcentral');
+var RC = require('@ringcentral/sdk').SDK;
+require('dotenv').config();
 
 var rcsdk = null
-if (process.env.ENVIRONMENT_MODE == "production"){
+if (process.env.ENVIRONMENT_MODE == "production") {
   rcsdk = new RC({
-    server:RC.server.production,
-    appKey: process.env.CLIENT_ID_PROD,
-    appSecret:process.env.CLIENT_SECRET_PROD,
+    server: RC.server.production,
+    clientId: process.env.CLIENT_ID_PROD,
+    clientSecret: process.env.CLIENT_SECRET_PROD,
   })
-}else{
+} else {
   rcsdk = new RC({
-      server:RC.server.sandbox,
-      appKey: process.env.CLIENT_ID_SB,
-      appSecret:process.env.CLIENT_SECRET_SB
-    })
+    server: RC.server.sandbox,
+    clientId: process.env.CLIENT_ID_SB,
+    clientSecret: process.env.CLIENT_SECRET_SB
+  })
 }
 
 var platform = rcsdk.platform()
 
 var engine = module.exports = {
-    login: function(req, res){
-      var un = ""
-      var pwd = ""
-      if (process.env.ENVIRONMENT_MODE == "production"){
-        un= process.env.USERNAME_PROD
-        pwd= process.env.PASSWORD_PROD
-      }else{
-        un= process.env.USERNAME_SB
-        pwd= process.env.PASSWORD_SB
-      }
+  login: function (req, res) {
+    var un = ""
+    var pwd = ""
+    if (process.env.ENVIRONMENT_MODE == "production") {
+      un = process.env.USERNAME_PROD
+      pwd = process.env.PASSWORD_PROD
+    } else {
+      un = process.env.USERNAME_SB
+      pwd = process.env.PASSWORD_SB
+    }
 
-      platform.login({
-        username:un,
-        password:pwd
+    platform.login({
+        username: un,
+        password: pwd
       })
-      .then(function(resp){
-        engine.readCallLogs(req, res)
+      .then(function (resp) {
+        readCallLogs(req, res)
       })
-      .catch(function(e){
+      .catch(function (e) {
         var errorRes = {}
         errorRes['calllog_error'] = "Cannot login."
         res.send(JSON.stringify(errorRes))
       })
-    },
-    readCallLogs(req, res){
-      var endpoint = "/account/~/extension/~/call-log"
-      if (req.query.access == "account")
-        endpoint = "/account/~/call-log"
+  }  
+}
 
-      platform.get(endpoint, req.body)
-      .then(function(resp){
-        var json = resp.json()
-        res.send(JSON.stringify(json.records))
-      })
-      .catch(function(e){
-        var errorRes = {}
-        var err = e.toString();
-        if (err.includes("ReadCompanyCallLog")){
-          errorRes['calllog_error'] = "You do not have admin role to access account level. You can choose the extension access level."
-          res.send(JSON.stringify(errorRes))
-        }else{
-          errorRes['calllog_error'] = "Cannot access call log."
-          res.send(JSON.stringify(errorRes))
-        }
-        console.log(err)
-      })
+
+async function readCallLogs(req, res) {
+  var endpoint = "/restapi/v1.0/account/~/extension/~/call-log"
+  if (req.query.access == "account")
+    endpoint = "/restapi/v1.0/account/~/call-log"
+
+  //console.log(endpoint, req.body);
+
+  try {
+    let getResult = await platform.get(endpoint, req.body);
+    let json = await getResult.json();
+    
+    //console.log(json);
+    res.send(JSON.stringify(json.records))
+  } catch (e) {
+    var errorRes = {}
+    var err = e.toString();
+    if (err.includes("ReadCompanyCallLog")) {
+      errorRes['calllog_error'] = "You do not have admin role to access account level. You can choose the extension access level."
+      res.send(JSON.stringify(errorRes))
+    } else {
+      errorRes['calllog_error'] = "Cannot access call log."
+      res.send(JSON.stringify(errorRes))
     }
-}
+    console.log(err)
+  }
+}
\ No newline at end of file
diff --git a/index.js b/index.js
index cd0cc32..19f752a 100755
--- a/index.js
+++ b/index.js
@@ -22,6 +22,6 @@ app.get('/', function (req, res) {
   res.render('index');
 })
 
-app.post('/readlogs', function (req, res) {
-  rc_engine.login(req, res)
+app.post('/readlogs', async function (req, res) {
+  await rc_engine.login(req, res)
 })
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..e8f1111
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1314 @@
+{
+  "name": "calllog visualization",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "calllog visualization",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "@ringcentral/sdk": "^4.6.1",
+        "body-parser": "^1.17.2",
+        "dotenv": "^4.0.0",
+        "ejs": "^2.5.6",
+        "express": "^4.15.3"
+      },
+      "engines": {
+        "node": "8.1.2"
+      }
+    },
+    "node_modules/@ringcentral/sdk": {
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/@ringcentral/sdk/-/sdk-4.6.1.tgz",
+      "integrity": "sha512-TwfvIlH7bUt1StJHZQe8dMdC/HKoW9uSnmNXpQezMvksRT6TUbRRq1Y+g9vNo8bB77lPWgzF0D1A4/deP1RTjQ==",
+      "dependencies": {
+        "dom-storage": "2.1.0",
+        "is-plain-object": "2.0.4",
+        "node-fetch": "2.6.1"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@ringcentral/sdk/node_modules/node-fetch": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz",
+      "integrity": "sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==",
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "dependencies": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/agentkeepalive": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/agentkeepalive/-/agentkeepalive-0.2.3.tgz",
+      "integrity": "sha1-hqQtoHtUi6kq1cX2TVjOHyaeX60=",
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
+    "node_modules/array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "node_modules/body-parser": {
+      "version": "1.19.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.1.tgz",
+      "integrity": "sha512-8ljfQi5eBk8EJfECMrgqNGWPEY5jWP+1IzkzkGdFFEwFQZZyaZ21UqdaHktgiMlH0xLHqIFtE/u2OYE5dOtViA==",
+      "dependencies": {
+        "bytes": "3.1.1",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.8.1",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.9.6",
+        "raw-body": "2.4.2",
+        "type-is": "~1.6.18"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/bytes": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.1.tgz",
+      "integrity": "sha512-dWe4nWO/ruEOY7HkUJ5gFt1DCFV9zPRoJr8pV0/ASQermOZjtq8jMjOprC0Kd10GLN+l7xaUPvxzJFWtxGu8Fg==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/content-disposition": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
+      "dependencies": {
+        "safe-buffer": "5.1.2"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/cookie": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
+      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==",
+      "engines": {
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+      }
+    },
+    "node_modules/cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
+    "node_modules/debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "dependencies": {
+        "ms": "2.0.0"
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+    },
+    "node_modules/depd": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
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+    "node_modules/destroy": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
+      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+    },
+    "node_modules/dom-storage": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/dom-storage/-/dom-storage-2.1.0.tgz",
+      "integrity": "sha512-g6RpyWXzl0RR6OTElHKBl7nwnK87GUyZMYC7JWsB/IA73vpqK2K6LT39x4VepLxlSsWBFrPVLnsSR5Jyty0+2Q==",
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+        "node": "*"
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+    "node_modules/dotenv": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-4.0.0.tgz",
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+        "body-parser": "1.19.0",
+        "content-disposition": "0.5.3",
+        "content-type": "~1.0.4",
+        "cookie": "0.4.0",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "finalhandler": "~1.1.2",
+        "fresh": "0.5.2",
+        "merge-descriptors": "1.0.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.3",
+        "path-to-regexp": "0.1.7",
+        "proxy-addr": "~2.0.5",
+        "qs": "6.7.0",
+        "range-parser": "~1.2.1",
+        "safe-buffer": "5.1.2",
+        "send": "0.17.1",
+        "serve-static": "1.14.1",
+        "setprototypeof": "1.1.1",
+        "statuses": "~1.5.0",
+        "type-is": "~1.6.18",
+        "utils-merge": "1.0.1",
+        "vary": "~1.1.2"
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+        "content-type": "~1.0.4",
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+        "raw-body": "2.4.0",
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+        "inherits": "2.0.3",
+        "setprototypeof": "1.1.1",
+        "statuses": ">= 1.5.0 < 2",
+        "toidentifier": "1.0.0"
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+      "engines": {
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+      }
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+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
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+        "bytes": "3.1.0",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "unpipe": "1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
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+    "node_modules/express/node_modules/toidentifier": {
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+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
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+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
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+      "dependencies": {
+        "debug": "2.6.9",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.3",
+        "statuses": "~1.5.0",
+        "unpipe": "~1.0.0"
+      },
+      "engines": {
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+      }
+    },
+    "node_modules/forwarded": {
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+}
diff --git a/package.json b/package.json
index c09e416..f06d43e 100755
--- a/package.json
+++ b/package.json
@@ -12,11 +12,11 @@
   "author": "Paco-Vu",
   "license": "MIT",
   "dependencies": {
+    "@ringcentral/sdk": "^4.6.1",
     "body-parser": "^1.17.2",
     "dotenv": "^4.0.0",
     "ejs": "^2.5.6",
-    "express": "^4.15.3",
-    "ringcentral": "^3.1.1"
+    "express": "^4.15.3"
   },
   "engines": {
     "node": "8.1.2"