Using $_. in write-host...how to narrow results

i have string @ end of series of if statements (adding users ad groups):

 else {write-host "user $_. not found in domain." -foregroundcolor yellow}

 works expected, object vaiable inserts all info path user account:

 user=usernamehere; mail=email@here.com; group1=mygroup...etc

i think i should able give me  the username, don't know how define obnject variable more specifcally. tried things $_.user , $_.logonname without sucess.

i acutally able resolve on own :)
turns out seeing $_. part of text string. breaking string in half , stiching + $_.user + got work:

write-host

 

 

 

("user "+ $_.user + " not found in domain.") -foregroundcolor yellow

Windows Server  >  Windows PowerShell