How to prevent the cache memory from being cleared when updating my app in xamarin

Question

Hello!

I need the cache memory of my application not to be deleted when updating it.

I need to retrieve session tokens. I used several methods like GetAccountsAsync. Since I use Microsoft authentication but when I update it returns null. As with the MonkeyCache tool, they work normally, but when I refresh the app, the token disappears.

In AppDelegate and MainActivity I have this

Barrel.ApplicationId = NSBundle.MainBundle.BundleIdentifier;

App class

                accessToken = Barrel.Current.Get<string>("access_token");

                //if (accounts.Count() > 0)
                if (!string.IsNullOrEmpty(accessToken))
                {
                    Helpers.Settings.IsLoged = true;
                }