Google Cloud Credentials

Google Cloud Nightscout » What is my Hostname, API_SECRET, FreeDNS ID or password?

If you have forgotten the hostname, the API_SECRET, your FreeDNS user ID, or your FreeDNS password, go to the status page. At the bottom, choose Login credentials.
You will be taken to a page where you can see all of those assuming you have completed installation. An example is shown below.