앱에 Play 게임즈 서비스 리콜 통합

<?xml version="1.0" encoding="utf-8"?>
<Manifest version="1">
    <Application>
        <PackageName>com.example.package</PackageName>
        <PlayGamesServices>
            <ProjectId>123456789</ProjectId>
        </PlayGamesServices>
    </Application>
</Manifest>

auto promise = std::make_shared<std::promise<RecallAccessResult>>();
games_recall_client.RequestRecallAccess(params, [promise](RecallAccessResult result) {
   promise->set_value(std::move(result));
});

auto recall_access_result = promise->get_future().get();
if (recall_access_result.ok()) {
   auto recall_session_id = recall_access_result.value().recall_session_id;
   // Pass the recall session ID to your backend game server so it can query
   // for an existing linked in-game account.
   // - If you discover an existing linked in-game account, continue to sign-in
   //   the in-game account. This provides a seamless cross-device sign-in
   //   experience.
   // - If there is not an existing linked in-game account, when the user
   //   completes the sign-in using your in-game account system record the
   //   account linking with Play Games Services Recall. This helps to provide
   //   a seamless cross-device sign-in experience when the user returns on a
   //   different device or after re-installing your game on the same device.
} else {
   // Handle the error
}