Fix issue 45070 : UserNotFoundException is not thrown

See symfony/symfony#45070.

Author: damienfa

Authenticator/Passport/Badge/UserBadge.php

@@ -13,6 +13,7 @@
 
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\AuthenticationServiceException;
+use Symfony\Component\Security\Core\Exception\UserNotFoundException;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Http\EventListener\UserProviderListener;
 
@@ -66,6 +67,15 @@ public function getUser(): UserInterface
             }
 
             $user = ($this->userLoader)($this->userIdentifier);
+
+            // No user has been found via the $this->userLoader callback
+            if (null === $user) {
+                $exception = new UserNotFoundException();
+                $exception->setUserIdentifier($this->userIdentifier);
+
+                throw $exception;
+            }
+
             if (!$user instanceof UserInterface) {
                 throw new AuthenticationServiceException(sprintf('The user provider must return a UserInterface object, "%s" given.', get_debug_type($this->user)));
             }