public function ezValue($stat, $value)
    {
        if (! isset($this->config['ez_key'])) {
            throw new Exception('StatHat EZ key not set.');
        }

        // If a prefix is set, prepend it to the stat name.
        if (! empty($this->config['prefix'])) {
            $stat = $this->config['prefix'].$stat;
        }

        $this->post('ez', ['ezkey' => $this->config['ez_key'], 'stat' => $stat, 'value' => $value]);
    }