custom new not authenticated URL expect /login.html? Follow

Hi everybody,

I'm trying to implement a plugin so that we can use Github OAuth Flow to login into TeamCity.
(context: https://devnet.jetbrains.com/message/5536986#5536986)

I added a link on the login page to use the github authentication.
Github now wants to call a configured callback url.
This callback URL contains the code to be used for an OAuth Token.
(like http://localhost:8111/oauth/callback.html?code=abc)

This callback URL must be on TeamCity and accessible without credentials.
Is it possible to register such a new URL?

Cheers,
Yann