src/Clients/GuzzleClient.php
public function post($endpoint, $data, $headers = [])
    {
        $request = new Request('POST', $endpoint, $headers, $data);

        $response = $this->guzzle->send($request);

        return $this->handle($response);
    }
public function post($endpoint, $data, $headers = [])
    {
        $request = new Request('POST', $endpoint, $headers, $data);

        $response = $this->guzzle->send($request);

        return $this->handle($response);
    }
Create a new POST reuest.

@param string       $endpoint The sub endpoint
@param string|array $data     The data to be submited
@param array        $headers  Request headers

@return array