router.post('/signup', (req, res) => {
    console.log('user signup');

    const { name, password } = req.body;

    if (String(name).length <= 3) {
        res.json({
            error: `Name should be min 4 characters`
        })
    }

    if (String(password).length <= 3) {
        res.json({
            error: `Password should be min 4 characters`
        })
    }

    // ADD VALIDATION
    User.findOne({ name: name }, (err, user) => {
        if (err) {
            console.log('User.js post error: ', err)
        } else if (user) {
            res.json({
                error: `Sorry, already a user with the name: ${name}`
            })
        }
        else {
            const newUser = new User({
                name: name,
                password: password
            })
            newUser.save((err, savedUser) => {
                if (err) return res.json(err)
                res.json(savedUser)
            })
        }
    })
})