async function cleanEverything() {
  const context = getContext();
  if (context) {
    const adapter = context.owner.lookup('adapter:application');

    await adapter.cache.clear();
  }

  // specifically, offline storage
  await localforage.clear();
  await localStorage.clear();
}

  @action
  logout(this: LogoutController) {
    this.currentUser.set('record', undefined);

    this.store.unloadAll('user');
    this.store.unloadAll('contact');
    this.store.unloadAll('identity');
    this.store.unloadAll('channel');

    localforage.clear();
    localStorage.clear();

    this.transitionToRoute('application');
  }

 .then(function() {
     return localforage.clear();
 })

 clearAllDrafts(): void {
   Observable.fromPromise(db.clear())
     .subscribe(() => console.info('The database has been cleared.'));
 }

 .then(function() {
     setItemSubscription.unsubscribe();
     clearSubscription.unsubscribe();
     return localforage.clear();
 })