When POSTing to https://servername:13299/api/v1.0/login
with the following headers:
Authorization: KSCBasic user="x", pass="x", internal="1"
I get the following message back: “Authentication failure”.
The user has full admin access, and can login to the KSC MMC console.
According to the documentation the user, pass and X-KSC-VServer should all be endcoded with Base64.