type posted struct {
    email    string `json:"email"`
    password string `json:"password"`
}

func Login(w http.ResponseWriter, r *http.Request) {

    var data posted

    decoder := json.NewDecoder(r.Body)
    decoder.Decode(&data)

    body,err := ioutil.ReadAll(r.Body)

    err = json.Unmarshal(body, &data); if err != nil { panic(err) }