function* tokenCheck() {
  const tokenStr = yield call(AsyncStorage.getItem, '@token');
  if (!tokenStr) return null;
  const token = JSON.parse(tokenStr);

  if (token) {
    const { user } = yield call(ApiService.getUser, token.access_token);

    yield all([
      put(tokenCreators.setToken(token)),
      put(userCreators.setUser(user)),
    ]);
  }

  return token;
}