To cancel a VPS product, provide either the KVM ID or service ID, along with the type of cancellation you wish to proceed with.
Your WHMCS email address.
"yourwhmc_email"
Your WHMCS password.
"yourwhmcs_password"
The KVM ID to cancel if the service ID is unknown.
"kvm_xxxxx_yyyyy"
The service ID to cancel if the KVM ID is unknown.
"1234"
The type of cancellation. Either 'Immediate' or 'End of Billing Period'.
"End of Billing Period"