public Result changeEmail(){
        if(session("login")==null)
            return  badRequest("you didn't authorize");
        JsonNode json;
        try{
            json = request().body().asJson();
        }
        catch (Exception e){
            return  notAcceptable("no body json");

        }
        String email = json.findValue("email").asText();
        if(email==null)
            return notAcceptable("no email");
        Пользователь user = Пользователь.find.query().where().eq("name",session("login")).findUnique();
        user.email=email;
        return ok("email changed");

    }