title: How can I "login" to git?
body: <p>I need to change who git thinks I am so I can push to a different repo ( both are mine. ).</p>
  
  <p>Here is a <a href="https://stackoverflow.com/questions/13103083/how-do-i-push-to-github-under-a-different-username">similar issue</a> but I don't want to set any config variables.</p>
  
  <p>I just want to login once to my current username.  I plan on deleting my other account.</p>
  
  <p>Here is the error when I attempt a <code>git push origin master</code></p>
  
  <blockquote>
    <p>remote: Permission to current_user/fav-front.git denied to
    user_to_delete. fatal: unable to access
    '<a href="https://github.com/current_user/repo.git/" rel="noreferrer">https://github.com/current_user/repo.git/</a>': The requested URL
    returned error: 403</p>
  </blockquote>
  
  <p>Please note that the git config variables for user and email ( user.name and user.email ) are not related to the authentication that <code>git push</code> uses.</p>
  
  <p>They are used for commits.</p>
  
  <p>To reiterate, I want to login to git as current user.</p>