Invoiced API Impotence

idempotence.rb

require 'invoiced'
require 'securerandom'

invoiced = Invoiced::Client.new('api_key_here')

# This will create a customer
customer = invoiced.Customer.create({
  :name => 'My Customer'
}, {
  :idempotency_key => SecureRandom.uuid
})

# Future calls with the same idempotency key will return the previously created customer
for i in 0..5
  customer2 = invoiced.Customer.create({
    :name => 'My Customer'
  }, {
    :idempotency_key => SecureRandom.uuid
  })
end