PS4 Minecraft Login - Random Account?

Hello,

So, I've had the common issue of being able to log in issuing my Microsoft account, as many have, and I had found a tutorial that seemed to work for most people.

I followed it, got my remote access code and it all seemed to be working fine, but when I logged on, it gave me this username I've never seen before in my life.

Everything else looks perfectly fine. The skin is the same from before, my store has the same funds and it displays my PS4 name, but on the title screen on the the bottom left, there's a name that is something I'd never pick in my life.

Does it randomly generate one, or did it give me someone else's name? Is there a way to fix this, or to change it to something I'd prefer?

Thank you for your time!

:)