[QUESTION] How to get the localized price OR the user's currency (or region) code?

I have the Google Play products saved to my database containing all the localized prices, which includes the region and currency code. But I'm struggling to find a way to get the price based on the user's currency or region. How can I achieve that?

From the user, I have only the auth code from GamesSignInClient.requestServerSideAccess()

I was thinking about getting the user's currency or region code and query the database, or maybe a specific API call to get the product already localized, but I couldn't find anything.