diff --git a/.env.example b/.env.example
index ea0665b..eb4b91e 100644
--- a/.env.example
+++ b/.env.example
@@ -8,12 +8,12 @@ LOG_CHANNEL=stack
 LOG_DEPRECATIONS_CHANNEL=null
 LOG_LEVEL=debug
 
-DB_CONNECTION=mysql
-DB_HOST=127.0.0.1
-DB_PORT=3306
-DB_DATABASE=laravel
-DB_USERNAME=root
-DB_PASSWORD=
+DB_CONNECTION=pgsql
+DB_HOST=pgsql
+DB_PORT=5432
+DB_DATABASE=intern_project
+DB_USERNAME=postgres
+DB_PASSWORD=password
 
 BROADCAST_DRIVER=log
 CACHE_DRIVER=file
diff --git a/app/Http/Controllers/AdminController.php b/app/Http/Controllers/AdminController.php
index dbc4e4c..b0b6260 100644
--- a/app/Http/Controllers/AdminController.php
+++ b/app/Http/Controllers/AdminController.php
@@ -15,6 +15,10 @@ public function index(){
     }
 
     //login module
+    /**
+     * Rename LoginFormValidator to LoginRequest
+     * 
+     */
     public function login(LoginFormValidator $request){
         try{
             if(auth()->guard('admin')->attempt($request->only(['username', 'password']))):
@@ -22,6 +26,12 @@ public function login(LoginFormValidator $request){
             else:
                 return redirect()->back()->with('message', 'Invalid Credentials');
             endif;
+
+             /**
+             * 
+             *  if there is already return function then no need to write else part.
+             * 
+             */
         }catch(\Exception $e){
             return redirect()->back()->with('message', $e->getMessage());
         }
@@ -31,6 +41,13 @@ public function login(LoginFormValidator $request){
     //logout module
     public function logout(Request $request){
         Auth::guard('admin')->logout();
+
+        /**
+         * remove Unnecesary codes
+         * 
+         *   $request->session()->invalidate();
+         *   $request->session()->regenerateToken();
+         */
         $request->session()->invalidate();
         $request->session()->regenerateToken();
         return redirect('/admin-login');
diff --git a/app/Http/Controllers/CategoryController.php b/app/Http/Controllers/CategoryController.php
index 69644d1..c9526e1 100644
--- a/app/Http/Controllers/CategoryController.php
+++ b/app/Http/Controllers/CategoryController.php
@@ -23,6 +23,12 @@ public function index(Category $category)
      */
     public function create(Category $category)
     {
+       
+        /**
+         * Alwyas try to paginate 
+         * 
+         * Write query in avariable instead of directly passing
+         */
         return view('backend.modals.admin-add-category', ['datas' => $category->whereNull('parent_id')
         ->orWhereHas('parent', fn ($query) => $query->whereNull('parent_id'))
         ->get()
@@ -30,6 +36,9 @@ public function create(Category $category)
     }
 
     /**
+     * Rename CategoryFormValidator to CategoryFormRequest
+     * 
+     * 
      * Store a newly created resource in storage.
      */
     public function store(CategoryFormValidator $request)
@@ -60,6 +69,13 @@ public function show(Category $category)
     public function edit(string $id)
     {
         try{
+
+            /**
+             * Always try to paginate instead of get();
+             * rename datas to data
+             * 
+             * 
+             */
             $editableData = Category::select('id', 'category_name','parent_id')->findOrFail($id);
             $datas = Category::whereNull('parent_id')
             ->orWhereHas('parent', fn ($query) => $query->whereNull('parent_id'))