git change user error

REF: https://blog.csdn.net/klxh2009/article/details/76019742

git clone xxx
update local files
更新github專案內容
git add .
git config --global user.email "userB@gamil.com"
git config --global user.name "userB"
git commit -m “upload template”
git push -u origin master

-----
check default user
git config --list

D:\Course1081\uTaipei\project\git2\UserB.github.io>git push -u origin master
remote: Permission to userB/userB.github.io.git denied to userA.
fatal: unable to access 'https://github.com/userB/userB.github.io.git/': The requested URL returned error: 403