If you haven't used Australia Post with a 3rd Party App like Veeqo you will need to get a Live API Key before you can Connect.
Your API Key will look something like this b20fc2c6-3692-4af2-85d8-99a43aa4abc2. If you already have an API Key for Australia Post just jump to the Add Australia Post Credentials section.
How To Get Australia Post Live API Key
To do this follow the steps below:
Login to Aus Post Developer Centre
Click on projects on the top menu
API access on the submenu on the right
Create a key
Copy and the API key and secret and send back to us to complete the integration