title: GitHub authentication failing over https, returning wrong email address
body: <p>Initiating a push or any other action with GitHub from the command line (over https, not ssh) that calls for the username and password not only fails but, when it does, it returns </p>
  
  <pre><code>Username for 'https://github.com': username
  Password for 'https://username@github.com': 
  remote: Invalid username or password.
  fatal: Authentication failed for 'https://github.com/username/repository.git/'
  </code></pre>
  
  <p>I do not have an <code>@github.com</code> address. The password and username are correct.</p>
  
  <p>I know I could switch to SSH and use keys but that doesn't answer why the authentication is failing over https.</p>