chore: change private to protected, allowing extensibility (#4119)

Author: imorland

framework/core/src/Forum/Auth/ResponseFactory.php

@@ -62,7 +62,7 @@ public function make(string $provider, string $identifier, callable $configureRe
         ));
     }
 
-    private function makeResponse(array $payload): HtmlResponse
+    protected function makeResponse(array $payload): HtmlResponse
     {
         $content = sprintf(
             '<script>window.close(); window.opener.app.authenticationComplete(%s);</script>',
@@ -72,7 +72,7 @@ private function makeResponse(array $payload): HtmlResponse
         return new HtmlResponse($content);
     }
 
-    private function makeLoggedInResponse(User $user)
+    protected function makeLoggedInResponse(User $user)
     {
         $response = $this->makeResponse(['loggedIn' => true]);