I'm finding good information about Account linking, and how it works, etc. So that is o.k. What I did not found and need help:
How can I log-out a user via Alexa?
* of cause the simplest is to provide and "log-out indent", and if there is no other way I will do so, but
since it is not convenient to provide kind of menu with voice feedback, the user does not know that there is a log-out indent. with visual interfaces that is easy with a preference menu, etc.
so that most user friendly option, would be to provide one of these two options:
a) providing some customizable link, e.g. in the welcome card in Alexa App, if the user presses it, he get logged-out
b) if Amazon could provide some link in Skill config to provide some standard way to allow user to log-out of account and delete auth_token.
c) well, as I understood, if a user logs-out of Alexa App, that auth_token get invalidated on Amazon side, BUT they are get not invalidated on my side, because of missing notification, to what I understood. So if a token was leaked, I'm not aware of it and can't deleted it from user account. Well I can of cause provide a token management page, like Google does it, but a user must be more aware of it, and that can't be the user friendly solution that is wanted long term.
Well, but of cause, maybe I miss something, if so, please tell me!
Thank you all!