Macro error 

macro_rules! error {
    ($handle:expr, $($arg:tt)+) => { ... };
}

Logs a message at error level via the given PAM handle.

This supports format!-style formatting.

Example

nonstick::error!(
    pam_handle,
    "error loading data from data source: {load_error}"
);
// Will log a message like "error loading data from data source: timed out"
// at ERROR level on syslog.