diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..40b878d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
\ No newline at end of file
diff --git a/index.js b/index.js
index a14cb5a..966dc6f 100644
--- a/index.js
+++ b/index.js
@@ -2,20 +2,31 @@ let passport = require('passport');
 let express = require('express');
 let https = require('https');
 let fs = require('fs');
+let ldap = require('ldapjs');
 
 let app = express();
 require('./config/passport.js');
-
 let session = require('express-session');
 
+let satitm_directory = ldap.createClient({
+  url: 'ldap://ad.satitm.chula.ac.th:389'
+});
+
+satitm_directory.bind('CN=SSOManager,OU=Service Accounts,DC=ad,DC=satitm,DC=chula,DC=ac,DC=th', '39BK5LCeU2NY2oG3beeBJH', function (err) {
+  if (err) {
+    console.log('Error:', err);
+  }
+  else {
+    console.log('Connected to SATITM Active Directory');
+  }
+});
+
 app.use(session({
   secret: 'RLCCDwstDuT6nMJf5kko7C',
   resave: false,
   saveUninitialized: true
 }));
 
-// ... rest of your code ...
-
 app.use(passport.initialize());
 app.use(passport.session());
 
@@ -26,6 +37,27 @@ app.get('/', function (req, res) {
   response = 'Hello World!<br>';
   console.log('User:', req.user);
   if (req.user) {
+    // Query Active Directory for user details
+    // username is the UPN
+    let username = req.user.username;
+    let opts = {
+      filter: `(uid=${username})`,// replace 'username' with the actual username
+      scope: 'sub',
+      attributes: ['dn', 'memberOf']
+    };
+  
+    satitm_directory.search('o=example', opts, function(err, res) {
+      res.on('searchEntry', function(entry) {
+        console.log('entry: ' + JSON.stringify(entry.object));
+      });
+      res.on('error', function(err) {
+        console.error('error: ' + err.message);
+      });
+      res.on('end', function(result) {
+        console.log('status: ' + result.status);
+      });
+    });
+
     console.log('User:', req.user);
     response += 'Username: ' + req.user.username + '<br>';
     response += 'First Name: ' + req.user.first_name + '<br>';
diff --git a/node_modules/.package-lock.json b/node_modules/.package-lock.json
index 2f7a426..8181152 100644
--- a/node_modules/.package-lock.json
+++ b/node_modules/.package-lock.json
@@ -12,6 +12,11 @@
         "node": ">=10.0.0"
       }
     },
+    "node_modules/abstract-logging": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/abstract-logging/-/abstract-logging-2.0.1.tgz",
+      "integrity": "sha512-2BjRTZxTPvheOvGbBslFSYOUkr+SjPtOnrLP33f+VIWLzezQpZcqVg7ja3L4dBXmzzgwT+a029jRx5PCi3JuiA=="
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -29,6 +34,33 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
+    "node_modules/asn1": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.6.tgz",
+      "integrity": "sha512-ix/FxPn0MDjeyJ7i/yoHGFt/EX6LyNbxSEhPPXODPL+KB0VPk86UYfL0lMdy+KCnv+fmvIzySwaK5COwqVbWTQ==",
+      "dependencies": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "node_modules/assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha512-NfJ4UzBCcQGLDlQq7nHxH+tv3kyZ0hHQqF5BO6J7tNJeP5do1llPr8dZ8zHonfhAu0PHAdMkSo+8o0wxg9lZWw==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/backoff": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/backoff/-/backoff-2.5.0.tgz",
+      "integrity": "sha512-wC5ihrnUXmR2douXmXLCe5O3zg3GKIyvRi/hi58a/XyRxVI+3/yM0PYueQOZXPXQ9pxBislYkw+sF9b7C/RuMA==",
+      "dependencies": {
+        "precond": "0.2"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/body-parser": {
       "version": "1.20.2",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
@@ -110,6 +142,11 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha512-3lqz5YjWTYnW6dlDa5TLaTCcShfar1e40rmcJVwCBJC6mWlFuj0eCHIElmG1g5kyuJ/GD+8Wn4FFCcz4gJPfaQ=="
+    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -260,6 +297,14 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
       "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA=="
     },
+    "node_modules/extsprintf": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.4.1.tgz",
+      "integrity": "sha512-Wrk35e8ydCKDj/ArClo1VrPVmN8zph5V4AtHwIuHhvMXsKf73UT3BOD+azBIW+3wOJ4FhEH7zyaJCFvChjYvMA==",
+      "engines": [
+        "node >=0.6.0"
+      ]
+    },
     "node_modules/finalhandler": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.2.0.tgz",
@@ -413,6 +458,35 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/ldap-filter": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/ldap-filter/-/ldap-filter-0.3.3.tgz",
+      "integrity": "sha512-/tFkx5WIn4HuO+6w9lsfxq4FN3O+fDZeO9Mek8dCD8rTUpqzRa766BOBO7BcGkn3X86m5+cBm1/2S/Shzz7gMg==",
+      "dependencies": {
+        "assert-plus": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/ldapjs": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/ldapjs/-/ldapjs-2.3.3.tgz",
+      "integrity": "sha512-75QiiLJV/PQqtpH+HGls44dXweviFwQ6SiIK27EqzKQ5jU/7UFrl2E5nLdQ3IYRBzJ/AVFJI66u0MZ0uofKYwg==",
+      "dependencies": {
+        "abstract-logging": "^2.0.0",
+        "asn1": "^0.2.4",
+        "assert-plus": "^1.0.0",
+        "backoff": "^2.5.0",
+        "ldap-filter": "^0.3.3",
+        "once": "^1.4.0",
+        "vasync": "^2.2.0",
+        "verror": "^1.8.1"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -512,6 +586,14 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
+      "dependencies": {
+        "wrappy": "1"
+      }
+    },
     "node_modules/parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
@@ -589,6 +671,14 @@
       "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
       "integrity": "sha512-KG8UEiEVkR3wGEb4m5yZkVCzigAD+cVEJck2CzYZO37ZGJfctvVptVO192MwrtPhzONn6go8ylnOdMhKqi4nfg=="
     },
+    "node_modules/precond": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/precond/-/precond-0.2.3.tgz",
+      "integrity": "sha512-QCYG84SgGyGzqJ/vlMsxeXd/pgL/I94ixdNFyh1PusWmTCyVfPJjZ1K1jvHtsbfnXQs2TSkEP2fR7QiMZAnKFQ==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/proxy-addr": {
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@@ -817,6 +907,48 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/vasync": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/vasync/-/vasync-2.2.1.tgz",
+      "integrity": "sha512-Hq72JaTpcTFdWiNA4Y22Amej2GH3BFmBaKPPlDZ4/oC8HNn2ISHLkFrJU4Ds8R3jcUi7oo5Y9jcMHKjES+N9wQ==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "dependencies": {
+        "verror": "1.10.0"
+      }
+    },
+    "node_modules/vasync/node_modules/verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
+    "node_modules/verror": {
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.1.tgz",
+      "integrity": "sha512-veufcmxri4e3XSrT0xwfUR7kguIkaxBeosDg00yDWhk49wdwkSUrvvsm7nc75e1PUyvIeZj6nS8VQRYz2/S4Xg==",
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=0.6.0"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    },
     "node_modules/xml-crypto": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/xml-crypto/-/xml-crypto-2.1.5.tgz",
diff --git a/package-lock.json b/package-lock.json
index 5a6f530..1eef4a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "dependencies": {
         "express": "^4.17.1",
         "express-session": "^1.17.2",
+        "ldapjs": "^2.2.3",
         "passport": "^0.4.1",
         "passport-saml": "^2.0.0"
       }
@@ -23,6 +24,11 @@
         "node": ">=10.0.0"
       }
     },
+    "node_modules/abstract-logging": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/abstract-logging/-/abstract-logging-2.0.1.tgz",
+      "integrity": "sha512-2BjRTZxTPvheOvGbBslFSYOUkr+SjPtOnrLP33f+VIWLzezQpZcqVg7ja3L4dBXmzzgwT+a029jRx5PCi3JuiA=="
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -40,6 +46,33 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
+    "node_modules/asn1": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.6.tgz",
+      "integrity": "sha512-ix/FxPn0MDjeyJ7i/yoHGFt/EX6LyNbxSEhPPXODPL+KB0VPk86UYfL0lMdy+KCnv+fmvIzySwaK5COwqVbWTQ==",
+      "dependencies": {
+        "safer-buffer": "~2.1.0"
+      }
+    },
+    "node_modules/assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha512-NfJ4UzBCcQGLDlQq7nHxH+tv3kyZ0hHQqF5BO6J7tNJeP5do1llPr8dZ8zHonfhAu0PHAdMkSo+8o0wxg9lZWw==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/backoff": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/backoff/-/backoff-2.5.0.tgz",
+      "integrity": "sha512-wC5ihrnUXmR2douXmXLCe5O3zg3GKIyvRi/hi58a/XyRxVI+3/yM0PYueQOZXPXQ9pxBislYkw+sF9b7C/RuMA==",
+      "dependencies": {
+        "precond": "0.2"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/body-parser": {
       "version": "1.20.2",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
@@ -121,6 +154,11 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
     },
+    "node_modules/core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha512-3lqz5YjWTYnW6dlDa5TLaTCcShfar1e40rmcJVwCBJC6mWlFuj0eCHIElmG1g5kyuJ/GD+8Wn4FFCcz4gJPfaQ=="
+    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -271,6 +309,14 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
       "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA=="
     },
+    "node_modules/extsprintf": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.4.1.tgz",
+      "integrity": "sha512-Wrk35e8ydCKDj/ArClo1VrPVmN8zph5V4AtHwIuHhvMXsKf73UT3BOD+azBIW+3wOJ4FhEH7zyaJCFvChjYvMA==",
+      "engines": [
+        "node >=0.6.0"
+      ]
+    },
     "node_modules/finalhandler": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.2.0.tgz",
@@ -424,6 +470,35 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/ldap-filter": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/ldap-filter/-/ldap-filter-0.3.3.tgz",
+      "integrity": "sha512-/tFkx5WIn4HuO+6w9lsfxq4FN3O+fDZeO9Mek8dCD8rTUpqzRa766BOBO7BcGkn3X86m5+cBm1/2S/Shzz7gMg==",
+      "dependencies": {
+        "assert-plus": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/ldapjs": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/ldapjs/-/ldapjs-2.3.3.tgz",
+      "integrity": "sha512-75QiiLJV/PQqtpH+HGls44dXweviFwQ6SiIK27EqzKQ5jU/7UFrl2E5nLdQ3IYRBzJ/AVFJI66u0MZ0uofKYwg==",
+      "dependencies": {
+        "abstract-logging": "^2.0.0",
+        "asn1": "^0.2.4",
+        "assert-plus": "^1.0.0",
+        "backoff": "^2.5.0",
+        "ldap-filter": "^0.3.3",
+        "once": "^1.4.0",
+        "vasync": "^2.2.0",
+        "verror": "^1.8.1"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -523,6 +598,14 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
+      "dependencies": {
+        "wrappy": "1"
+      }
+    },
     "node_modules/parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
@@ -600,6 +683,14 @@
       "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
       "integrity": "sha512-KG8UEiEVkR3wGEb4m5yZkVCzigAD+cVEJck2CzYZO37ZGJfctvVptVO192MwrtPhzONn6go8ylnOdMhKqi4nfg=="
     },
+    "node_modules/precond": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/precond/-/precond-0.2.3.tgz",
+      "integrity": "sha512-QCYG84SgGyGzqJ/vlMsxeXd/pgL/I94ixdNFyh1PusWmTCyVfPJjZ1K1jvHtsbfnXQs2TSkEP2fR7QiMZAnKFQ==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/proxy-addr": {
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@@ -828,6 +919,48 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/vasync": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/vasync/-/vasync-2.2.1.tgz",
+      "integrity": "sha512-Hq72JaTpcTFdWiNA4Y22Amej2GH3BFmBaKPPlDZ4/oC8HNn2ISHLkFrJU4Ds8R3jcUi7oo5Y9jcMHKjES+N9wQ==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "dependencies": {
+        "verror": "1.10.0"
+      }
+    },
+    "node_modules/vasync/node_modules/verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
+    "node_modules/verror": {
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.1.tgz",
+      "integrity": "sha512-veufcmxri4e3XSrT0xwfUR7kguIkaxBeosDg00yDWhk49wdwkSUrvvsm7nc75e1PUyvIeZj6nS8VQRYz2/S4Xg==",
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=0.6.0"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    },
     "node_modules/xml-crypto": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/xml-crypto/-/xml-crypto-2.1.5.tgz",
diff --git a/package.json b/package.json
index 2a6a55d..4faf9f1 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "express": "^4.17.1",
     "passport": "^0.4.1",
     "passport-saml": "^2.0.0",
-    "express-session": "^1.17.2"
+    "express-session": "^1.17.2",
+    "ldapjs": "^2.2.3"
   }
 }