Cannot read property 'config' of undefined

[clocked0ne]

During deployment in Circle CI after updating to 4.2.0 I'm seeing the folowing error:

TypeError: Cannot read property 'config' of undefined
      at Object.addApiKey (/home/circleci/project/node_modules/serverless-add-api-key/src/helper.js:286:31)

It looks like if for whatever reason provider.sdk isn't populated then creating this new property for httpOptions throws the error