Powershell command to select one value

My PowerShell command is working fine as below :

PS C:\Users\username> whoami /userUSER INFORMATION----------------User Name        SID================ ==============================================wip\username     S-1-5-21-57989841-616248376-1811674531-4551702

But when I try to select only SID, it is showing blank

PS C:\Users\username> whoami /user | Select-Object "User information"User information----------------blank

I am expecting "S-1-5-21-57989841-616248376-1811674531-4551702" instead of blank