Login xml file for multiple vcenter - VICredentialStoreItem

Hello, I have a script to run every day (powershell) and it connecting with three different vcenter,
I need to create login credential file,

Should I create separate login files? Is possible to create a unique file with same credential for all of them? (3 different IP)

Add-PSSnapin vmware.VimAutomation.core
New-VICredentialStoreItem –Host 10.0.0.10 –User EU\gemela –Password ######## –File C:\Users\gemela\my.xml
$logincred = Get-VICredentialStoreItem -Host 10.0.0.10 -File C:\Users\gemela\my.xml

Thanks