Some keys not able to be modified as designed.

[scottgit]

I have no idea if there is any desire to update this plugin. But if so, one issue I had was that it could not modify stepFunctions since that was not a direct key on the service of the serverless object.

Fix
I believe the fix for this would be change this line of code to reference the deeper configuration input. So change:

const { service } = this.serverless;

to

const service = this.serverless.configurationInput;

That gives you the whole object build of the configuration file for the service.

A Workaround
For others who are trying to use this plugin, a work around is to build your key object to modify that deeper level. So this:

  serverless-configuration:
    prod:
      add:
        serverless:  # Add this
          configurationInput:  # Add this
            provider: