azureKeyVault secret name [vault-name]
azureKeyVault returns a secret value retrieved from an Azure Key
Vault.
The mandatory secret name argument specifies the name of the secret to
retrieve.
The optional vault name argument specifies the name of the vault, if not set,
the default vault name will be used.
Warning
The current implementation will always return the latest version of the secret. Retrieving a specific version of a secret is not supported.