After your next login to the game, you will be able to actually choose what identity you want to use! You can either go with your Minecraft name, or your Aethro Account and same for your avatar!
This was a necessary backend as we will be expanding this to allow for other games and options in the near future.
Another thing you will notice is on your Public Profile and Account Profiles have new data added -
Your playtime will be synced starting probably tomorrow and a new wallet system is being added to Shadows to store Relic coins which will become our primary currency in game.
Have fun :)