SSO login does not work when using a multilingual website

Problem/Motivation

I have a multilingual website. When I install and configure the o365 module and try to log in via Microsoft SSO login, it does not work. I then receive this message in the logs: "An anonymous user tried to log in using o365, this is not allowed."

Steps to reproduce

1. Configure your site as multilingual, e.g. www.example.com/nl, www.example.com/en
2. Install and configure the o365 module
3. Go to the login form, e.g. www.example.com/nl/user/login
4. Click on the "login with Microsoft" link

This results in a redirect back to the login form and a message in the logs "An anonymous user tried to log in using o365, this is not allowed.".

Drupal version: 11.2.3
PHP version: 8.4.8

Proposed resolution

Update the AuthenticationService::redirectToAuthorizationUrl to correctly handle requests from urls with a language code.

If I update the code on the first line of the redirectToAuthorizationUrl method from
if ($this->currentUser->isAnonymous() && !$this->helperService->strStartsWith($this->request->getPathInfo(), '/o365/login')) {

to
if ($this->currentUser->isAnonymous() && !$this->helperService->strStartsWith($this->request->getPathInfo(), '/nl/o365/login')) {

it works correctly again.

Of course, the solution needs to be more dynamic, but I wanted to show the possible solution.