In my application when user will buy any product using In- app Purchase i can not force user please log in in my application [ That is apple condition]
When a user will buy any product apple just give a in app purchase transaction_id .
In that case i can not keep track any users information in my system. later when the user will restore his In - app purchase product in another device, without any user track/ apple id/ Unique ID i can not manage my application.
how to i can get apple users unique id by transaction_id..?
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