This page states endpoint for Azure ACS for US gov is https://accounts.accesscontrol.windows.net/ but this does not work and throws error AADSTS900382: Confidential Client is not supported in Cross Cloud request
Looking for a confirmation whether the correct one is https://login.microsoftonline.us/?
Confirmed with Microsoft, this document is outdated and the updated endpoint for Azure ACS for US Gov cloud is https://login.microsoftonline.us/