Connecting custom carrier API

Step 1:
Generate API credentials: https://channeldock.com/portal/public/settings/api_keys

Step 2:
Make API call to add a custom shipping method: https://documenter.getpostman.com/view/16435285/2s9XxsUbPy#67f2a11c-8553-4480-a195-ac9b92379148

Step 3:
Generate a label in ChannelDock.

• The request data/params that are send to the endpoint on label generation: callback_data.json
  
• The expected response in JSON: callback_response.json