Use a standardized transformer base; replace all client transformers to call that base

app/Transformers/Api/Client/SubuserTransformer.php

@@ -3,28 +3,19 @@
 namespace Pterodactyl\Transformers\Api\Client;
 
 use Pterodactyl\Models\Subuser;
+use Pterodactyl\Transformers\Api\Transformer;
 
-class SubuserTransformer extends BaseClientTransformer
+class SubuserTransformer extends Transformer
 {
-    /**
-     * Return the resource name for the JSONAPI output.
-     */
     public function getResourceName(): string
     {
         return Subuser::RESOURCE_NAME;
     }
 
-    /**
-     * Transforms a subuser into a model that can be shown to a front-end user.
-     *
-     * @return array|void
-     *
-     * @throws \Pterodactyl\Exceptions\Transformer\InvalidTransformerLevelException
-     */
-    public function transform(Subuser $model)
+    public function transform(Subuser $model): array
     {
         return array_merge(
-            $this->makeTransformer(UserTransformer::class)->transform($model->user),
+            (new UserTransformer())->transform($model->user),
             ['permissions' => $model->permissions]
         );
     }