Thanks for your answer.
I understand there are already sample importing & exporting metadata.
But my point is after importing, how can I connect to their login page?
Sorry maybe I am confused. I saw how to communicate between SP and IdP
but that happens at vendor's server side.(in my case)
At my side, I am just client and I don't have SP nor IdP.
I just wanted to consume their service.
Metadata guides contains in regard of this?