} catch (CaptchaRequiredException e) {
String message = captcha == null ? "Captcha required for verification." : "Invalid captcha given.";
throw new SignalControl.Error.RequiresCaptcha(message);
} catch (CaptchaRequiredException e) {
String message = captcha == null ? "Captcha required for verification." : "Invalid captcha given.";
throw new SignalControl.Error.RequiresCaptcha(message);