I'm trying to create a custom login site for my existing website to check user's account, that is a valid Minecraft.net account (only account name verification isn't enough).
But a huge problem occurred, the API under the "authserver.mojang.com" domain can't handle the preflight (options method) request send by the browser, so I can't send the authentication data to the API.
The reason why I want to send the authentication data to the API directly from the clients browser is, that I don't want to get an IP ban for my server if a user doesn't know his authentication data correctly.

Please fix this error as soon as possible to handle all request according to the web standard.