element-ui + redis + mongo + nuxt

 let {username,password} = req.body;
    let  u = await UserModel.findOne({username});
    if(u){
        res.json({
            err:1,
            data:‘用户名已存在‘
        })
    }

router.post(‘/login‘,async (req,res)=>{
    let {username,password} = req.body;
    let  u = await UserModel.findOne({username,password});
    console.log(u)
    if(u){
        // req.session.user = u;
        res.json({
            err:0,
            data:‘登录成功‘
        })
    }else{
        res.json({
            err:1,
            data:‘登录失败‘
        })
    }
});