title: Generate url with user Api-key in rails
body: <p>I need to generate a url in rails that has the user's api-key in it (<code>webcal://123@mywebsite.com/calendar.ics</code> where '123' is the authentication token for the user), so that the user can use this link without being logged into the app. How do I generate this url?</p>
  
  <pre><code>calendar_publisher_lists_url(:format =&gt; :ics, :only_path =&gt; false,:protocol =&gt; "web cal")
  </code></pre>
  
  <p>generates a link like <code>webcal://mywebsite.com/calendar.ics</code> how do I add in the api-key?</p>