Function cmd_key_create 

pub async fn cmd_key_create(
    client: &VtaClient,
    key_type: &str,
    derivation_path: Option<String>,
    mnemonic: Option<String>,
    label: Option<String>,
    context_id: Option<String>,
    internal: bool,
    yes: bool,
) -> Result<(), Box<dyn Error>>