Hey @Youssouf_Ouologuem!
The Public feature doesn't require any user authorization for access. Instead, anyone with a link can view your application.
If your application requires auth I would suggest using a Portal. You can use Embed if you would like to nest your app in an existing site with it's own auth.
This explanation from another forum post, in addition to the article linked about about temporary variables will be highly useful to you!
Temporary State variables will not be synced across different instances of the same app, they will be isolated to each browser session for that specific app. The temp state variable will be reset to its initial value at the start of every new browser session in the app. If you reload your browser, the temp state variable will be reset. The initial value of a temp state variable might not necessarily be
null, but will be whatever it is set to.
Let me know if that clears things up 