Logout not remove local storage token

Cause in my backend api there is no logout endpoint. My config for logout is
```
logout: {
redirect: {
success: '/',
failure: '/',
},
```
The redirect happens but not remove the token authentication from local storage. I was forced to add manually `localStorage.removeItem('auth_app_token');` in @nebular/auth/components/logout/logout.component.js

Is there a config for logout without calling backend api?
Is it causing the failure for not removing local token?

Thanks