嗨，我正在学习MERN，并试图解决有关登录页面的API连接问题。**handeLoginSubmit（）**在提交登录表单时运行，并尝试N catch。
输入错误的凭据或仅正确的凭据，try块从后端运行，它给出错误，但在前端，它在正确/错误的凭据上显示成功

>front-end(react code)

async function handeLoginSubmit(e) {
        e.preventDefault();
        try {
            await axios.post('/login', { email, password });
            alert('Login Successfull')
            // console.log('No - error');
        } catch (e) {
            // console.log('error');
            alert('Login Failed!')
        }
    }

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> backend code for express server with post request 

app.post('/login', async (req, res) => {
    const { email, password } = req.body;
    const userDoc = await User.findOne({ email });
    console.log(userDoc);
    if (userDoc) {
        const passOk = bcrypt.compareSync(password, userDoc.password)
        if (passOk) {
            res.json('passok')
        } else {
            res.status(422).json('wrong crediantials')
        }
        console.log(' user found');
    } else {
        res.json('not found!!')
        console.log('not found!!')
    }
})