Help Newbie Powershell Scripter here

Hello All,
I have a csv/excell file like so:
Server               Database    Users
xxxxxx\yyyyyyy zzzzz             $ISSAdxxxxxL
xxxxxx\yyyyyyy zzzzz             $ITIllllllllllallllll
xxxxxx\yyyyyyy zzzzz             svckaldfasdf
xxxxxx\yyyyyyy zzzzz             svcSQLSupportSrvr
xxxxxx\yyyyyyy zzzzz             us438478

I am writing a powershell script to help send an email to the manager of each line of user in the "Users" column to confirm if the user still need an access. Below is my attempt.

##Required for AD Support
Import-Module activedirectory

# List email recipients who should receive email
$Dba = "dba@organization.com"

#Application & file paths
$ApplicationPath = "C:\script\databaseUsers\"
$RemediationCSV = $ApplicationPath + "SQL2000_Remediation.csv"
$ManagerCSV = $ApplicationPath + "ManagersResult.csv"
$UserCSV = $ApplicationPath + "UsersResult.csv"


### Deletes previous file
Remove-Item $UserCSV

import-csv $RemediationCSV | foreach {
$ServerName = $_.Server
$DatabaseName = $_.Database
$UserCSV = $_.Users


if ($_.Users -like "us.*" or "ew.*" or "os.*" or "sp.*"){ # This is a single user account 

### look in the LDAP for user's manager

### Create the mail message and add the $Results.csv text file as an attachment###
Send-MailMessage –From $InraDba –To $ManagerCSV –Subject "Confirm user access to Database" –Body "Below is the list of users who have access to the database $DatabaseName. As the manager, please confirm that users still need access to the datbase, else access will be revoked in 7 days." -Attachment $UserCSV –SmtpServer 
            }

else ### This is a service account, look in the database inventory for the owner of the database.

Not sure how to go into the database
Send-MailMessage –From $InraDba –To $OwnerCSV –Subject "Confirm user access to Database" –Body "Below is the list of service account that have access to the database $. As the owner, please confirm that thise service account still need access to the datbase, else access will be revoked in 7 days." -Attachment $ResultsCSV –SmtpServer some.servers.com
}


Please help anyway you can to make this script work.
Thanks in advance.