lib/plugins/config/config.js/Config/track
class Config:  track() {
    const sls = this.serverless;
    if (sls && sls.processedInput && sls.processedInput.options) {
      const opts = sls.processedInput.options;
      if (opts.provider === 'aws') {
        userStats.track('user_awsCredentialsConfigured');
      }
      // TODO add other providers here when supported
    }
    return BbPromise.resolve();
  }