Function handle_device 

pub fn handle_device(
    cmd: DeviceCommand,
    repo_opt: Option<PathBuf>,
    identity_ref_override: Option<String>,
    identity_blob_name_override: Option<String>,
    attestation_prefix_override: Option<String>,
    attestation_blob_name_override: Option<String>,
    passphrase_provider: Arc<dyn PassphraseProvider + Send + Sync>,
    http_client: &Client,
    env_config: &EnvironmentConfig,
) -> Result<()>