Small code fixes in API code

pub/api/classes/API_users.php

@@ -5,6 +5,7 @@ namespace api\classes;
 use api\classes\API;
 use api\classes\API_usergroups;
 use bin\php\Classes\mailBuilder;
+use JetBrains\PhpStorm\NoReturn;
 
 require_once 'API.php';
 require_once $_SERVER['DOCUMENT_ROOT'] . '/bin/php/Classes/mailBuilder.php';
@@ -20,6 +21,7 @@ class API_users extends API
         return $items;
     }
 
+    #[NoReturn]
     public function createUser()
     {
         # check if the user already exists
@@ -102,6 +104,7 @@ The Sentri gnomes';
         return $API_usergroups->getUserGroup()[0]['user_group_weight'];
     }
 
+    #[NoReturn]
     public function updateUser()
     {
         # check if the user exists
@@ -133,6 +136,7 @@ The Sentri gnomes';
         $this->apiOutput(200, ['success' => 'User successfully updated.']);
     }
 
+    #[NoReturn]
     public function deleteUser()
     {
         # delete an user