Small code fixes in API code

pub/api/classes/API_mfa.php

@@ -3,11 +3,13 @@
 namespace api\classes;
 
 use api\classes\API;
+use JetBrains\PhpStorm\NoReturn;
 
 require_once 'API.php';
 
 class API_mfa extends API
 {
+    #[NoReturn]
     public function disableMFA()
     {
         # Users cannot, by default disable MFA of other users
@@ -23,6 +25,7 @@ class API_mfa extends API
         $this->apiOutput(200, ['success' => 'mfa is disabled']);
     }
 
+    #[NoReturn]
     public function enableMFA()
     {
         # Users cannot, create MFA of other users