src/Http/Session.php
public function setFlash($key, $value, $redirect = null)
    {
        $this->set('_nur_flash', [$key => $value]);

        if (! is_null($redirect)) {
            uri()->redirect($redirect);
        }

        return false;
    }
public function setFlash($key, $value, $redirect = null)
    {
        $this->set('_nur_flash', [$key => $value]);

        if (! is_null($redirect)) {
            uri()->redirect($redirect);
        }

        return false;
    }
Setting Flash Message

@param string $key
@param mixed $value
@param string $redirect

@return bool