Comment by Kwpolska

Solving the problem of having a personal and a work GitHub account is really trivial without any extra tools. All you need is a dedicated SSH key for that GitHub account. (And why would you have a password for a ssh key on your personal machine?)

~/.ssh/config

    Host github.com-work
     HostName github.com
     User git
     IdentityFile ~/.ssh/work_id_rsa
     IdentitiesOnly yes

~/.git/config

    [user]
    email = [email protected]

    [remote "origin"]
    url = github.com-work:Work/Widget.git