A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
I read the whole thread and the whole point is to be able to use an actual feature from the engine, not to have to use a costly third party plugin...
I have the same frustrating issue here, I can get the listing of all my achievements without issues but I am unable to get...