You have this Express.js code snippet:

You have this Express.js code snippet:

app.post('/users', (req, res) => {
  if (!req.body.email) {
    res.status(422).send({ error: 'Email is required' });
  } else {
    res.status(201).send({ message: 'User created' });
  }
});

What is the problem if the client sends an empty JSON body?