User Profile

Hi all, I'm creating an app that breaks pieces of it into a bunch of IAPs. I'm planning on offering a one week trial of one of the pieces. Currently I'm handling this by creating a consumable IAP that the app grants the user at the start of runtime of the app. That seems to be working, as it grants the IAP, and the IAP expires after the set time for the trial expires. What I'm wondering is if it is possible to include the consumable at the time of downloading the app so that a user does not get prompted to enter in their Apple ID and password from within the app to receive the consumable. Due to some certifications my app will need to meet, the granting of the trial IAP needs to be a seamless process once the app is running on the device, and any prompts for a user's Apple credentials need to be locked behind an age gate.