Creating a credit note on Invoiced in Ruby

create_credit_note.rb

require 'invoiced'

invoiced = Invoiced::Client.new('XXXXX', true)

customerId = 134523
invoiceId = 1213602

creditNote = invoiced.CreditNote.create(
  :customer => customerId,
  :invoice => invoiceId,
  :items => [
    {
      :name => "Copy paper, Case",
      :quantity => 1,
      :unit_cost => 45
    },
    {
      :catalog_item => "delivery",
      :quantity => 1
    }
  ],
  :taxes => [
    {
      :amount => 3.85
    }
  ]
)

print creditNote

# Retrieve the invoice to see the updated balance
print invoiced.Invoice.retrieve(invoiceId)