To setup the connion of Ninja Shop to Campaign monitor, go to Ninja Shop > Features and click on the gear next to Campaign Monitor
You can access your Campaign Monitor API keys by logging into your Campaign Monitor account. Then hoose manage account and then select the API Keys section.
Once you add your Campaign monitor API key, you will be able to choose the Campaign Monitor Client and List.
You can also change the text of the label for the Campaign Monitor opt-in and choose if the Campaign Monitor Opt-in is checked by default.
Customizing Your Shop