Help with account and widgets

I build my pc with a RTX 2080ti strix, I9 9900, 32gb ddr5, 1tb ssd, 2 hdd

I just upgraded to windows 11, and expected an necessary login, since I always only use lokal accounts. I didnt had to, and no account was connected, but there is an account connected to widgets. I gave my pc to a friend and I guess he connected his windows account for the time beeing and removed it afterwards, because his email is still connected with the new widgets functionality. In the widgets app I can log in and out without needing a password. I only need to press "login as **@...". I went to account settings, but there is just my local profile without any account connected. I asked my friend to look if he can remove the pc from the windows page, what he did. Its still connected with widgets. Still one click to login. Is there a way to remove his account? Will his account be logged-in some other applications as well ? I saw online that you can remove widgets entirely from windows, would reinstalling it fix it ?

Really would appreciate help on this, it doesn't seem intended

"Anmelden" is german for "log-in" "Anmelden als" for "log-in as"

Doesn't matter which I press, instantly logged in