diff --git a/src/Entity/UserType.php b/src/Entity/UserType.php
index fb4cb30..541a194 100644
--- a/src/Entity/UserType.php
+++ b/src/Entity/UserType.php
@@ -74,7 +74,7 @@ class UserType extends ConfigEntityBundleBase implements UserTypeInterface {
    */
   public function isLocked() {
     $locked = \Drupal::state()->get('user.type.locked');
-    return isset($locked[$this->id()]) ? $locked[$this->id()] : FALSE;
+    return $locked[$this->id()] ?? FALSE;
   }
 
   /**
diff --git a/src/UserTypeForm.php b/src/UserTypeForm.php
index eb3a9c2..2de8c1d 100644
--- a/src/UserTypeForm.php
+++ b/src/UserTypeForm.php
@@ -22,10 +22,10 @@ class UserTypeForm extends BundleEntityFormBase {
     $form['#title'] = ($this->operation == 'add') ? $this->t('Add account type') : $this->t('Edit %label account type', ['%label' => $this->entity->label()]);
 
     $form['label'] = [
-      '#title' => t('Name'),
+      '#title' => $this->t('Name'),
       '#type' => 'textfield',
       '#default_value' => $type->label(),
-      '#description' => t('The human-readable name of this account type.'),
+      '#description' => $this->t('The human-readable name of this account type.'),
       '#required' => TRUE,
       '#size' => 30,
     ];
@@ -39,22 +39,22 @@ class UserTypeForm extends BundleEntityFormBase {
         'exists' => ['Drupal\user_bundle\Entity\UserType', 'load'],
         'source' => ['label'],
       ],
-      '#description' => t('A unique machine-readable name for this account type. It must only contain lowercase letters, numbers, and underscores. This name will be used for constructing the URL of the %user-add page, in which underscores will be converted into hyphens.', [
-        '%user-add' => t('Add user'),
+      '#description' => $this->t('A unique machine-readable name for this account type. It must only contain lowercase letters, numbers, and underscores. This name will be used for constructing the URL of the %user-add page, in which underscores will be converted into hyphens.', [
+        '%user-add' => $this->t('Add user'),
       ]),
     ];
 
     $form['description'] = [
-      '#title' => t('Description'),
+      '#title' => $this->t('Description'),
       '#type' => 'textarea',
       '#default_value' => $type->getDescription(),
-      '#description' => t('This text will be displayed under this account type on the <em>Add new user</em> page.'),
+      '#description' => $this->t('This text will be displayed under this account type on the <em>Add new user</em> page.'),
     ];
 
     if ($this->moduleHandler->moduleExists('language')) {
       $form['language'] = [
         '#type' => 'details',
-        '#title' => t('Language settings'),
+        '#title' => $this->t('Language settings'),
       ];
 
       $language_configuration = ContentLanguageSettings::loadByEntityTypeBundle('user', $type->id());
@@ -76,8 +76,8 @@ class UserTypeForm extends BundleEntityFormBase {
    */
   protected function actions(array $form, FormStateInterface $form_state) {
     $actions = parent::actions($form, $form_state);
-    $actions['submit']['#value'] = t('Save account type');
-    $actions['delete']['#value'] = t('Delete account type');
+    $actions['submit']['#value'] = $this->t('Save account type');
+    $actions['delete']['#value'] = $this->t('Delete account type');
     return $actions;
   }
 
diff --git a/src/UserTypeListBuilder.php b/src/UserTypeListBuilder.php
index d34c5a5..4d64388 100644
--- a/src/UserTypeListBuilder.php
+++ b/src/UserTypeListBuilder.php
@@ -17,9 +17,9 @@ class UserTypeListBuilder extends ConfigEntityListBuilder {
    * {@inheritdoc}
    */
   public function buildHeader() {
-    $header['title'] = t('Name');
+    $header['title'] = $this->t('Name');
     $header['description'] = [
-      'data' => t('Description'),
+      'data' => $this->t('Description'),
       'class' => [RESPONSIVE_PRIORITY_MEDIUM],
     ];
     return $header + parent::buildHeader();
diff --git a/user_bundle.module b/user_bundle.module
index 9150af4..21d5556 100644
--- a/user_bundle.module
+++ b/user_bundle.module
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * @file
+ * Description.
+ */
+
 use Drupal\Core\Link;
 /**
  * @file