allow user credential to be a id = 0

.gitignore

@@ -1,6 +1,7 @@
 /build
 /vendor
 /.idea
+/.vscode
 .php-cs-fixer.cache
 .phpunit.result.cache
 composer.lock

src/Http/Requests/AssertionRequest.php

@@ -121,7 +121,7 @@ class AssertionRequest extends FormRequest
      */
     protected function findUser(WebAuthnAuthenticatable|array|int|string|null $credentials): ?WebAuthnAuthenticatable
     {
-        if (!$credentials) {
+        if ($credentials === null) {
             return null;
         }