src/Support/Http.php
public function post($url, $params = [])
    {
        $key = is_array($params) ? 'form_params' : 'body';

        return $this->request('POST', $url, [$key => $params]);
    }
public function post($url, $params = [])
    {
        $key = is_array($params) ? 'form_params' : 'body';

        return $this->request('POST', $url, [$key => $params]);
    }
Send A Http POST Request

@param  string $url
@param  array  $params

@return \Psr\Http\Message\ResponseInterface