hi , GracefulToad94 .
About Upgrade.

This version is deployed in the productive environment, so it is not easy to upgrade it.

About special user.

an ordinary user with the following information:
url:

http://{webServerHost}/api/v2.13/auth/create_user

createRequest:

type AuthCreateUserReq struct {
   Avatar     string 
   // brain, this value is also configured for apiserver's env CLEARML__APISERVER__DEFAULT_COMPANY(brain)
   Company    string 
   // kubebrain@megvii.com
   Email      string 
   // kubebrain
   FamilyName string 
   // kubebrain
   GivenName  string  
   // kubebrain
   Name       string 
   // user
   Role       string 
}

hi, SuccessfulKoala55
About creation.

like above

About unique.

This user is the first user in this company, so I think it is unique.