feat(usermanagement): enhance user-branch relationship by syncing branches and adding timestamps

app/Models/User.php

@@ -110,6 +110,7 @@ class User extends Authenticatable
 
     public function branches()
     {
-        return $this->belongsToMany(Branch::class, 'user_branches', 'user_id', 'branch_id');
+        return $this->belongsToMany(Branch::class, 'user_branches', 'user_id', 'branch_id')
+            ->withTimestamps();
     }
 }