class ZuoraConnect::AppInstanceBase

def kms_key(raise_on_blank: false)
  kms_value = ENV['AWS_KMS_ARN'] || aws_secrets['AWS_KMS_ARN']
  raise ZuoraConnect::Exceptions::Error.new("Missing KMS key") if raise_on_blank && kms_value.blank?
  return kms_value
end