req, err := http.NewRequest(http.MethodPost, idpEndpoint, strings.NewReader(data.Encode()))
	if err != nil {
		return nil, err
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.SetBasicAuth(clientID, clientSecret)
	t := &http.Transport{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: true,
		},
	}
	hclient := http.Client{
		Transport: t,
	}
	resp, err := hclient.Do(req)

pkg net/http, method (*Request) ParseMultipartForm(int64) error
pkg net/http, method (*Request) ProtoAtLeast(int, int) bool
pkg net/http, method (*Request) Referer() string
pkg net/http, method (*Request) SetBasicAuth(string, string)
pkg net/http, method (*Request) UserAgent() string
pkg net/http, method (*Request) Write(io.Writer) error
pkg net/http, method (*Request) WriteProxy(io.Writer) error