I am using Unity IAP. I have 3 subscriptions, one of them has a 3 day trial period, which is available only once for activation. How can I find out if the user has already used the trial period? I need this to change the inscription on the activation button. Initially, I just saved locally, but if the player reinstalls the game, then he will again have a button written on the button about the trial period, although it will no longer be available to him. Interested in both for ios and for android.