Hello, this blueprint working for me. I can use, IAP, achievements, Leaderboards on my project.
I’m using ue_4.27 and I did it with internal plugins.
Note: Your project must be published on google play.
Step 1:
make sure, you added this 2 lines
step 2:
if still not working
You didnt make your cloud.google settings. Here, I have a little steps.
if you can’t make it again, you can tell me. I would be happy to help you.
https://forums.unrealengine.com/t/google-play-login-problem/512019/2?u=angelisdead