func (lc *LoginController) PostLogin(w http.ResponseWriter, r *http.Request) {
var um *models.User
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&um); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if !um.Authenticate(um) {
http.Error(w, "Invalid username or password.", http.StatusUnauthorized)
return
}
}
