Define function/callbacks in ENV?

Ember CLI
4

there is a similar thing done for trackjs wrapper https://github.com/jherdman/ember-cli-trackjs#one-caveat

// app/instance-initializers/configure-trackjs.js

export function initialize(application) {
  const trackJs = application.container.lookup('service:trackjs');

  trackJs.configure({
    onError(payload, err) {
      // exclude errors from log in page
      if (payload.url && payload.url.indexOf('login') > 0) {
        return false;
      }

      return true;
    }
  });
}

export default {
  name: 'trackjs-error-and-serializer-configuration',
  initialize: initialize
}

Maybe you could do the same here