server.js

app.post('/api/verify-token', (req, res) => {
  const { otp, request_id } = req.body;
    if (!otp) return res.status(400).send({ message: "Otp is required" });
    if (!request_id) return res.status(400).send({ message: "Invalid request" });

    verifyOtp(request_id, otp, async (result) => {
      if (result) {
        // ...
        res.send({ message: "Success" });
      } else {
        // ...
        return res.status(400).send({ message: `Error verifying OTP` });
      }
    })
})