SHELL

git username email

git config --global user.name "Your Name"
git config --global user.email "youremail@yourdomain.com"

add git user and email

git config --global user.email "my.adresse@hotmail.com"
git config --global user.name "My Name"

git user email

git config --global user.name "John Smith"
git config --global user.email "johnsmith@example.com"