I made a registration page using dva, using the fake interface of roadhogrc. The server can receive the POST request, but it can’t get req.body. What should I do? I’m so anxious. What should I do? It’s been a whole morning, can anyone help me aaaa...QAQ...
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[`POST /api/signin`](req,res){
        const user = req.body;
        console.log(user) //undefined
        res.json('123')
    }