lib/plugins/logs/logs.js/Logs/track
class Logs:  track() {
    const sls = this.serverless;
    if (sls && sls.processedInput && sls.processedInput.options) {
      const opts = sls.processedInput.options;
      const type = (opts.tail) ? 'service_logsTailed' : 'service_logsViewed';
      this.userStats.track(type);
    }
    return BbPromise.resolve();
  }