ref: added PHP Doc block

Author: shahghasiadil

src/Domain/User/Entities/User.php

@@ -21,7 +21,7 @@ class User extends Authenticatable
     /**
      * The attributes that are mass assignable.
      *
-     * @var array<int, string>
+     * @var list<string>
      */
     protected $fillable = [
         'name',
@@ -33,7 +33,7 @@ class User extends Authenticatable
     /**
      * The attributes that should be hidden for serialization.
      *
-     * @var array<int, string>
+     * @var list<string>
      */
     protected $hidden = [
         'password',