Android In-App Billing error You need to sign into your google account

Question

I am implementing in-app purchase using https://github.com/anjlab/android-inapp-billing-v3 . But while in app pop up open it shows \"Error Authentication is required.You nee

Answer 1

Solved, It was only mistake of product Id, The product Id from Play-store and in app SKU_NAME should be same for in app billing.

It is not mention properly in iab sample project which one is productId
i.e SKU_GAS ="gas" and SKU_PREMIUM="premium" in project
then
"gas" and "premium" must be available on play-store as productId.