Can't patch or post on instance

[Sh4d1]

Version: f1fb457

When posting or patching on instancem I got:
received status code 400: error type is invalid_request_error: Request data is empty.

[Sh4d1]

i := instance.NewApi(scwClient)
        if err != nil {
                log.Fatalf(err.Error())
        }
        request := &instance.CreateServerRequest{
                Zone: utils.ZoneFrPar1,
                Name: "test",
        }
        _, err := i.CreateServer(request)
        if err != nil {
                log.Fatalf(err.Error())
        }

[Sh4d1]

Fixed by #23