I want to display a message to users like below, after 20 mins of inactivity.
"You have been logged out, please login again"
Specifically, for example, a user logs in, after 20 mins inactivity, s/he clicks any links on the page, s/he will be redirected to the Login page via the built-in FormAuthModule, and the message above will be displayed on the Login page.
Considerations
1) It is `forms auth` time out (The `Forms` element), not `session` time out (`SessionState` element)
2) Ideally, I don't want to change the built-in Form Auth's redirection logic, to use JavaScript.
3) Forms Auth module only modifies forms auth ticket after half of period. Please find relevant article below:
Quoted below:
"Forms auth tickets aren't actually updated until half of the time
goes by. So if you have timeouts set to an hour and send in one
request ...
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