diff --git a/app/models/SOAP.php b/app/models/SOAP.php
index c9de818e612e8517f7868f64cada4fd947d2401d..3729ce7f0e3c4072f28ca341ac2b8b88e1bd9c18 100644
--- a/app/models/SOAP.php
+++ b/app/models/SOAP.php
@@ -9,7 +9,7 @@ class SOAP{
 
     public function __construct($wsdl){
         $this->key = SOAP_KEY;
-        $this->$wsdl = WSDL;
+        $this->wsdl = WSDL;
 
         $this->streamContext = stream_context_create(
             array(
diff --git a/app/models/administrator.php b/app/models/administrator.php
index 5ece14ba755fcf63a64bce8b0870fa62c4daeb91..73f013f2133a7a8db88b3c8d3500d3e2cd9458f6 100644
--- a/app/models/administrator.php
+++ b/app/models/administrator.php
@@ -2,10 +2,6 @@
 require_once 'SOAP.php';
 class Administrator extends User{
     private string $organization;
-    
-    private $db;
-
-    private $table;
 
     public function __construct(){
         $this->db = new Database;
diff --git a/app/models/reviewer.php b/app/models/reviewer.php
index 87d66380df81c8e2f37a8ac14835da7e311bb139..4a09fc48520eda25de4704f1799f561c47e83fef 100644
--- a/app/models/reviewer.php
+++ b/app/models/reviewer.php
@@ -3,8 +3,6 @@ class Reviewer extends User{
     private string $occupation;
     private int $score;
 
-    private $db;
-
     public function __construct(){
         $this->db = new Database;
     }
diff --git a/app/models/student.php b/app/models/student.php
index c1e2bb51783fcff888324a6491c852ca85a31042..c1926c7a34afe1e56e902b8b96e383188ff3ed3d 100644
--- a/app/models/student.php
+++ b/app/models/student.php
@@ -6,8 +6,6 @@ class Student extends User {
     private string $street;
     private string $city;
     private string $zipcode;
-    private $db;
-    private $table;
 
     public function __construct(){
         $this->db = new Database;
diff --git a/app/models/superadmin.php b/app/models/superadmin.php
index 2e66658b436ad6970ab9f414275e9e9a74ad4859..83fed1beea13f8dc223cb946cf9695afe2ca7b47 100644
--- a/app/models/superadmin.php
+++ b/app/models/superadmin.php
@@ -1,6 +1,5 @@
 <?php
 class Superadmin extends User{
-    private $db;
     public function __construct(){
         $this->db = new Database;
     }
diff --git a/app/models/user.php b/app/models/user.php
index 5cf95a66c5ce7c78ffe8f5391db17e9992769fb1..0a3c8c1505012869faf7f3b831a733b370322896 100644
--- a/app/models/user.php
+++ b/app/models/user.php
@@ -1,14 +1,14 @@
 <?php
 class User{
-    private int $userID;
-    private string $name;
-    private string $role;
-    private string $email;
-    private string $password;
-    private bool $isVerified;
-    private string $image;
-    private $db;
-    private $table;
+    protected int $userID;
+    protected string $name;
+    protected string $role;
+    protected string $email;
+    protected string $password;
+    protected bool $isVerified;
+    protected string $image;
+    protected $db;
+    protected $table;
 
     public function __construct(){
         $this->db = new Database;