title: Force Git to prompt for username and password
body: <p>I closed a PHP project that I posted on google code.</p>
  
  <p>The problem is that when I try to use the following command:</p>
  
  <pre><code>git push origin master
  </code></pre>
  
  <p>I get the following authentication error message:</p>
  
  <pre><code>fatal: remote error: Invalid username/password.
  You may need to use your generated googlecode.com password; see https://code.google.com/hosting/settings
  </code></pre>
  
  <p>How can I force Git to prompt for username and password in order to resolve this issue?</p>