How i can change account cuz my friends connect his acc on my pc but we cannot play together ty for help

[i make ppl leave]

helpppppp

[Dss0]

unknow soldier click your avatar in the top right corner and select "logout".

[BO2]

Go to the Launcher, click on the accounts profile in the top right and Click
"Logout" Then sign in with the other account of your choice.