WooCommerce Australia Post Shipping

Dear PAC User,

As noted in our Postage Assessment Calculator (PAC) update in April 2016, we’ve now migrated the PAC API to a new host URL: https://digitalapi.auspost.com.au

Next, we’re going to decommission the old PAC API URL: https://auspost.com.au/api
What you should do
Please update your websites and applications and migrate to the new URL as soon as possible. You can test the new URL directly at https://digitalapi.auspost.com.au.
What to expect
How you use the API won’t change. Your existing PAC API key, all of the API endpoints and the Service Codes will be the same. The API is fully documented on the Developer Centre.
Decommission date
We plan to decommission the old link by the end of 2016. We’ll monitor usage of the new and old URLs and will keep you updated on the final decommission date.

I got this mail what should i do.