Before running any script with the avn-api, let's set your AvN mnemonic or secret seed generated via the previous page as an environment variable by running in your terminal:
export SURI=<mnemonic OR secret seed>
Your secret URI could either be a mnemonic seed phrase or the secret seed (private key) of your account.
export SURI=industry icon train animal assist park sister wrong hammer cruise faint describe
This does not return anything.
It's important that you keep the mnemonic/seed secret safe and not expose it anywhere else. If this data is compromised, you could lose your funds.