How will I save my credentials every loop in Powershell - windows

Question

Is there a way in saving my credentials so it will not keep asking every loop? Like, isolating it outside the foreach loop. I tried removing -credentials and add it outside but it gives me an error of unauthorized access. I can't seem to figure it out. Sorry if this question seem to be stupid, I'm new to Powershell.
Import-Module ActiveDirectory
$ServerList = Get-Content "C:\servers.txt"
foreach($ServerName in $ServerList){
"$ServerName"
"=========="
Get-WmiObject -Class Win32_UserAccount -Computer $ServerName -Filter "LocalAccount='True'" -credential CORPORATE\usmenm03adm| Select Name
" "
}

Answer 1

You can define the credential outside the loop.
I edited your script like below
Import-Module ActiveDirectory
$ServerList = Get-Content "C:\servers.txt"
$cred=Get-Credential
foreach($ServerName in $ServerList){
"$ServerName"
"=========="
Get-WmiObject -Class Win32_UserAccount -Computer $ServerName -Filter "LocalAccount='True'" -credential $cred | Select Name
" "
}

Answer 2

Yes, read the credentials once with Get-Credential and store in a variable:
Import-Module ActiveDirectory
$ServerList = Get-Content "C:\servers.txt"
$MyCredential = Get-Credential -UserName "CORPORATE\usmenm03adm" -Message "Enter WMI credentials"
foreach ($ServerName in $ServerList) {
"$ServerName"
"=========="
Get-WmiObject -Class Win32_UserAccount -Computer $ServerName -Filter "LocalAccount='True'" -Credential $MyCredential | Select-Object Name
" "
}