return tls.Certificate{}, ErrTLSReadError(nil).Msgf("Unable to read the public key: %s", err)
	}
	keyPEMBlock, err := os.ReadFile(keyFile)
	if err != nil {
		return tls.Certificate{}, ErrTLSReadError(nil).Msgf("Unable to read the private key: %s", err)
	}
	key, rest := pem.Decode(keyPEMBlock)
	if len(rest) > 0 {
		return tls.Certificate{}, ErrTLSUnexpectedData(nil).Msgf("The private key contains additional data")
	}
	if key == nil {

		}
		return "<nil>"
	}
	return u.detail
}

// Msg - Replace the current error's message
func (u Err) Msg(m string) Err {
	e := u.Clone()
	e.msg = m
	return e
}

// Msgf - Replace the current error's message
func (u Err) Msgf(m string, args ...interface{}) Err {
	e := u.Clone()
	if len(args) == 0 {
		e.msg = m
	} else {
		e.msg = fmt.Sprintf(m, args...)
	}
	return e
}