title: Git push results in "Authentication Failed"
body: <p>I have been using GitHub for a little while, and I have been fine with <code>git add</code>, <code>git commit</code>, and <code>git push</code>, so far without any problems. Suddenly I am having an error that says:</p>
  <blockquote>
  <p>fatal: Authentication Failed</p>
  </blockquote>
  <p>In the terminal I cloned a repository, worked on a file and then I used <code>git add</code> to add the file to the commit log and when I did <code>git commit</code>, it worked fine. Finally, <code>git push</code> asks for username and password. I put those in correctly and every time I do this, it says the same error.</p>
  <p>What is the cause of this problem and how can I fix it?</p>
  <p>The contents of <code>.git/config</code> are:</p>
  <pre><code>[core]
          repositoryformatversion = 0
          filemode = true
          bare = false
          logallrefupdates = true
  [remote &quot;origin&quot;]
          url = http://www.github.com/######/Random-Python-Tests
          fetch = +refs/heads/*:refs/remotes/origin/*
  [branch &quot;master&quot;]
          remote = origin
          merge = refs/heads/master
  [user]
          name = #####
          email = ############
  </code></pre>