getContact API 调用将持续运行，不会引发错误。解决方法是什么？

问：

//@desc Get contact
//@route GET api/contacts/:id
//@access public
const getContact = asyncHandler(async (req,res) => {
    const ret = await Contact.findById(req.params.id)
    console.log(ret); // Line 6
    if(!(await ret)){
        res.status(404);
        throw new Error("Contact not found");
    }
    res.status(200).json(ret);
});

上面的代码是 api 调用，我尝试检索通过参数传递的 ID 为“id”的联系人。

errorHandler：

// In this componenet, all errors of this application will be dealt with.

//Import constants for cleaner error handling
const constants = require("../constants");

// Errors consist of error, response, request and the next function
const errorHandler = (err, req, res, next) =>{
    // When an error is caused, we check the status of the response and determine the cause
    const status = res.statusCode? res.statusCode : 500;
    switch(status){
        case 400:
            res.json({
                title: "BAD REQUEST",
                message: err.message,
                stackTrace: err.stack
            });
            break;
        case 404:
            res.json({
                title: "NOT FOUND",
                message: err.message,
                stackTrace: err.stackTrace
            });
            break;
        case 403:
            res.json({
                title: "FORBIDDEN REQUEST",
                message: err.message,
                stackTrace: err.stackTrace
            });
            break;
        case 401:
            res.json({
                title: "UNAUTHORIZED",
                message: err.message,
                stackTrace: err.stackTrace
            });
            break;
        case 500:
            res.json({
                title: "SERVER ERROR",
                message: err.message,
                stackTrace: err.stackTrace
            });
            break;
        default:
            // console.log("res - ", res)
            // console.log("req - ", req)
            // console.log("err", err)

            console.log("Error Handler working...");
            break;
    };
};

module.exports = errorHandler;

路线：

//Handle all requests - get, put, post and delete

// Import all express functionalities
const server = require("express");

// Create a router through express
const router = server.Router();

// - After creating all routes, we need to import controller functions
const {getAllContacts, createContact, getContact, updateContact, deleteContact} = require("../Controllers/allControllers");
// We need to route all the api calls
router.route("/").get(getAllContacts).post(createContact);

router.route("/:id").get(getContact).put(updateContact).delete(deleteContact);

// Expose all routes
module.exports = router;

猫鼬架构：

const mongoose = require("mongoose");

const contactSchema = mongoose.Schema({
    name: {
        type: String,
        required: [true, "Please enter the name"]
    },
    email: {
        type: String,
        required: [true, "Please enter the email"]
    },
    phone: {
        type: String,
        required: [true, "Please enter the number"]
    }
},
{ 
    timestamps: true 
});

module.exports = mongoose.model("Contact", contactSchema);

快乐路径有效，但是当我尝试发送未存储在我的集合（mongoDB）中的文档中的id时，api调用会继续运行。errorHandler 会自动调用默认情况并继续执行。第 6 行不记录任何内容。

这是我使用 node 和 express 的第一个项目。请让我知道如何解决此问题。