implermented key import

src/php/Entities/Games/KeyAttribute.php

@@ -0,0 +1,22 @@
+<?php
+declare(strict_types=1);
+
+namespace GamesShop\Entities\Games;
+
+enum KeyAttribute: string
+{
+    case NONE = 'none';
+    case GAME_NAME = "game_name";
+    case KEY = "key";
+    case STORE = 'store';
+    case FROM = 'from';
+
+    public static function casesAsAssociative(): array {
+        $result = [];
+        foreach (self::cases() as $case) {
+            $result[$case->name] = $case->value;
+        }
+
+        return $result;
+    }
+}