fix - make:auth returns exception in validator.php

Author: LeJeanbono

src/Security/InteractiveSecurityHelper.php

@@ -92,24 +92,25 @@ public function guessUserClass(SymfonyStyle $io, array $providers, string $quest
 
         $userClass = $io->ask(
             $questionText ?? 'Enter the User class that you want to authenticate (e.g. <fg=yellow>App\\Entity\\User</>)',
-            $this->guessUserClassDefault(),
+            $this->guessUserClassDefault($io),
             [Validator::class, 'classIsUserInterface']
         );
 
         return $userClass;
     }
 
-    private function guessUserClassDefault()
+    private function guessUserClassDefault(SymfonyStyle $io)
     {
         if (class_exists('App\\Entity\\User') && isset(class_implements('App\\Entity\\User')[UserInterface::class])) {
+            $io->note('Found a default class App\\Entity\\User');
             return 'App\\Entity\\User';
         }
 
         if (class_exists('App\\Security\\User') && isset(class_implements('App\\Security\\User')[UserInterface::class])) {
+            $io->note('Found a default class App\\Security\\User');
             return 'App\\Security\\User';
         }
-
-        return null;
+        return $io->error('This value cannot be blank and no default class found');
     }
 
     public function guessUserNameField(SymfonyStyle $io, string $userClass, array $providers): string