admin_showroom can only edit sample of his own showroom

web/modules/custom/materio_samples/materio_samples.module

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @file
+ * Contains materio_sapi.module.
+ */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+use Solarium\QueryType\Select\Query\Query;
+use Drupal\search_api\Query\QueryInterface;
+use Drupal\Core\Template\Attribute;
+
+
+function materio_samples_form_node_materiau_edit_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id){
+  // get current user
+  $user = \Drupal\user\Entity\User::load(\Drupal::currentUser()->id());
+  if(!$user->hasPermission('materio_samples_edit_materiaux_titles')){ 
+    $form['title']['#access'] = false;
+  }
+}