The API server api-hsq93r is running with a Session Manager profile. A script on it needs to know its own addresses, without asking anyone outside.

1. Keep the instance's id in ID and start a session on it.
2. Inside, ask the metadata service for instance-id without a token, with curl -I, and read the status.
3. Fetch a token into TOKEN.
4. With the token, save the instance's public IP to /tmp/public-ip.txt and its private IP to /tmp/private-ip.txt, then exit.