Apple Push Notification Authentication Key (Sandbox & Production)
<p>I recently noticed a new option when creating a certificate for a given iOS client.</p>

<p>The option is titled </p>

<blockquote>
  <p><strong>Apple Push Notification Authentication Key (Sandbox &amp; Production)</strong></p>
  
  <p>Get an authentication key to generate server-side tokens.  You can use
  these tokens as an alternative to certificates for your  notification
  requests. </p>
  
  <p>One authentication key can be used for multiple apps and does not
  expire.</p>
</blockquote>

<p>How does one go about setting this up? </p>