Google Cloud Nightscout » FAQ » 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.
