ktvmanager/routes/postUser.js

var express = require('express');
var router = express.Router();

const sql = require('../lib/mysql')
/* POST postUser page. */
router.post('/', async function (req, res, next) {
  sql.query(`SELECT
      userAccounts.username,
      streams.streamName,
      streams.streamURL
    FROM users
      INNER JOIN userAccounts
        ON users.idusers = userAccounts.userID
      INNER JOIN streams
        ON userAccounts.stream = streams.streamName
        WHERE users.username = '${req.body.username}'`, function (err, tt) {
    if (err) {
      console.log("User Not Found: ", err);
    }
    else {
      if (tt.length === 0) {
        res.send('User Not Found')
      } else {
        console.log(tt);
        res.send(tt);
      }
    }
  });
});

module.exports = router;