Shopify/active_shipping — pull request #122 by scottlangendyk (2013-11-21 17:10:41+00:00)
Title: CanadaPostPWS: Allow customer number to be set in constructor

Customer number has more in common with the API keys than rating. I think it makes more sense to at least have the option of passing it into the constructor, that way the find_rates method can be used as expected.