OvrPlatform_IAP_LaunchCheckoutFlow Function

Launch the checkout flow to purchase the existing product. Oculus Home tries handle and fix as many errors as possible. Home returns the appropriate error message and how to resolve it, if possible. Returns a purchase on success, and an error on user cancellation or other errors.

In the case of a user cancelation, the field FOvrError::Message value will contain a JSON object with a "category" property containing a value of "user_canceled".

void OVRPLATFORM_API OvrPlatform_IAP_LaunchCheckoutFlow(UGameInstance *GameInstance, FString Sku, OvrPlatform_IAP_LaunchCheckoutFlow_Delegate &&Delegate)