title: Flutter iOS delete cache when reinstall or update the app
body: <p>I developed an app on Flutter. There is registration on the app.</p>
  <p>When I install the app on iOS Phone. I logged in on the app, then I directly deleted the app from the iPhone for the test. Then I reinstall the app to the same phone. But app shows that I already logged in even though I am not logged on the second installation.</p>
  <p>I think the phone is caching the first-time login and even if I delete the app, the cache is not deleting. Could it be the case?</p>
  <p>I want to delete all data when the app is deleted or updated.</p>
  <p>P.S. There is no such kind of problem on Android. When I delete the app from Android phone, everything is deleted and after reinstalling it, I need to log in.</p>