Is it possible to create a POST request using guzzle6 which has .pfx-certificate attached to it?
The documention only mentions pem-format: http://docs.guzzlephp.org/en/stable/request-options.html#cert
Although the documentation at http://docs.guzzlephp.org/en/stable/request-options.html#cert doesn't mention it, it seems to be possible to also use pfx-format with guzzle.