Lost my player id

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community and Merry Christmas.

Hello Julia, because from my research this game belongs to Gameloft, and if you have already contacted them, this is the best way for them to help you with your issue.

https://support.gameloft.com/

Hi every xbox live account is associated with a microsoft account. So even your xbox one account where all your progress and games are saved has a microsoft account. It is probably a different one than the one you keep trying to sign into. Try requesting
your microsoft account infromation using your email. You will probably get two different responses, use the one you are not familar with to log into your xbox one's account and use that in the future. Hope this helps!

Lets be real here now if NOS was in the game then you would see people ID's popping up everywhere from crashing because the player can't take the speed like some other players can. It would be funny to watch people crash because they lost control of the
car from to much speed.

I lost my message as well and Id really like it if I could somehow get it back.

If you think you have migrated your Mojang account to the wrong Microsoft account you have to speak to Mojang support to reverse this. That's what they themselves say in the FAQ they published about migration. I also recommend checking your other Microsoft accounts and in Minecraft launcher delete all accounts and re-add your Microsoft account again.