You need to login (LoginWithToken) once TalkPlus API has been initialized.
You can get the token required when calling LoginWithToken through the AuthV4.getHiveTalkPlusLoginToken() function after calling AuthV4.signIn().
When a user logs out, make sure to call the Logout function of TalkPlus. If the Logout function call is omitted, the user will continue to receive notifications even when offline.