Auth_middleware.js

const jwt = require("jsonwebtoken")
const User = require("../models/user")

const auth = async (req, res, next) => {
  try {
    const token = req.header("Authorization").replace("Bearer ", "")
    const decode = jwt.verify(token, "thisismysecretkey")
    const user = await User.findOne({ _id: decode._id, "tokens.token": token })

    if (!user) {
      throw new Error()
    }

    req.token = token
    req.user = user

    next()
  } catch (error) {
    res.status(401).send({ error: "Please authenticate" })
  }
}

module.exports = auth