diff --git a/src/Appwrite/Utopia/Response.php b/src/Appwrite/Utopia/Response.php
index d3b89e0bc8..11bd52a288 100644
--- a/src/Appwrite/Utopia/Response.php
+++ b/src/Appwrite/Utopia/Response.php
@@ -32,6 +32,7 @@ class Response extends UtopiaResponse
     const MODEL_USER = 'user';
     const MODEL_USER_LIST = 'userList';
     const MODEL_SESSION = 'session';
+    const MODEL_SESSION_LIST = 'sessionList';
     const MODEL_TOKEN = 'token'; // - Missing
 
     // Database
@@ -75,6 +76,7 @@ class Response extends UtopiaResponse
             ->setModel(new ErrorDev())
             // Lists
             ->setModel(new BaseList('Users List', self::MODEL_USER_LIST, 'users', self::MODEL_USER))
+            ->setModel(new BaseList('Sessions List', self::MODEL_SESSION_LIST, 'sessions', self::MODEL_SESSION))
             ->setModel(new BaseList('Files List', self::MODEL_FILE_LIST, 'files', self::MODEL_FILE))
             ->setModel(new BaseList('Teams List', self::MODEL_TEAM_LIST, 'teams', self::MODEL_TEAM))
             ->setModel(new BaseList('Memberships List', self::MODEL_MEMBERSHIP_LIST, 'memberships', self::MODEL_MEMBERSHIP))
@@ -156,14 +158,12 @@ class Response extends UtopiaResponse
                     $document->setAttribute($key, $rule['default']);
                 }
                 else {
-                    var_dump($data);
-                    throw new Exception('Missing response key: '.$key);
+                    throw new Exception('Model '.$model->getName().' is missing response key: '.$key);
                 }
             }
 
             if($rule['array']) {
                 if(!is_array($data[$key])) {
-                    var_dump($data);
                     throw new Exception($key.' must be an array of type '.$rule['type']);
                 }
 
diff --git a/src/Appwrite/Utopia/Response/Model/Session.php b/src/Appwrite/Utopia/Response/Model/Session.php
index 6146feb31d..96b816f352 100644
--- a/src/Appwrite/Utopia/Response/Model/Session.php
+++ b/src/Appwrite/Utopia/Response/Model/Session.php
@@ -16,7 +16,7 @@ class Session extends Model
                 'example' => '5e5ea5c16897e',
             ])
             ->addRule('expire', [
-                'type' => 'string',
+                'type' => 'integer',
                 'description' => 'Session expiration date in Unix timestamp.',
                 'example' => 1592981250,
             ])
@@ -25,6 +25,81 @@ class Session extends Model
                 'description' => 'IP session in use when the session was created.',
                 'example' => '127.0.0.1',
             ])
+            ->addRule('osCode', [
+                'type' => 'string',
+                'description' => 'Operating system code name. View list of [available options](https://github.com/appwrite/appwrite/blob/master/docs/lists/os.json).',
+                'example' => 'Mac',
+            ])
+            ->addRule('osName', [
+                'type' => 'string',
+                'description' => 'Operating system name.',
+                'example' => 'Mac',
+            ])
+            ->addRule('osVersion', [
+                'type' => 'string',
+                'description' => 'Operating system version.',
+                'example' => 'Mac',
+            ])
+            ->addRule('clientType', [
+                'type' => 'string',
+                'description' => 'Client type.',
+                'example' => 'browser',
+            ])
+            ->addRule('clientCode', [
+                'type' => 'string',
+                'description' => 'Client code name. View list of [available options](https://github.com/appwrite/appwrite/blob/master/docs/lists/clients.json).',
+                'example' => 'CM',
+            ])
+            ->addRule('clientName', [
+                'type' => 'string',
+                'description' => 'Client name.',
+                'example' => 'Chrome Mobile iOS',
+            ])
+            ->addRule('clientVersion', [
+                'type' => 'string',
+                'description' => 'Client version.',
+                'example' => '84.0',
+            ])
+            ->addRule('clientEngine', [
+                'type' => 'string',
+                'description' => 'Client engine name.',
+                'example' => 'WebKit',
+            ])
+            ->addRule('clientEngineVersion', [
+                'type' => 'string',
+                'description' => 'Client engine name.',
+                'example' => '605.1.15',
+            ])
+            ->addRule('deviceName', [
+                'type' => 'string',
+                'description' => 'Device name.',
+                'example' => 'smartphone',
+            ])
+            ->addRule('deviceBrand', [
+                'type' => 'string',
+                'description' => 'Device brand name.',
+                'example' => 'Google',
+            ])
+            ->addRule('deviceModel', [
+                'type' => 'string',
+                'description' => 'Device model name.',
+                'example' => 'Nexus 5',
+            ])
+            ->addRule('countryCode', [
+                'type' => 'string',
+                'description' => 'Country two-character ISO 3166-1 alpha code.',
+                'example' => 'US',
+            ])
+            ->addRule('countryName', [
+                'type' => 'string',
+                'description' => 'Country name.',
+                'example' => 'United States',
+            ])
+            ->addRule('current', [
+                'type' => 'boolean',
+                'description' => 'Returns true if this the current user session.',
+                'example' => true,
+            ])
         ;
     }