Setup git commit username and email address

Set git user name 
git config --global user.name "firstname Lastname"


Set git user email address
git config --global user.email "email@domain.com"


Setup/add github remote url
git remote add origin git@github.com:username/reponame.git

Or,
git remote add origin https://github.com/username/reponame.git

Verify github remote url
git remote -v