module.exports.updateUser = async (req, res) => {
  const { tag } = req.body

  const user = await User.findOne({
    _id: req.session.user.id
  }).exec()

  if (!user) {
    req.session.destroy()
    return res.status(500).end()
  }

  if (tag) {
    user.tag= tag

    try {
      await user.save()
    } catch (err) {
      if (err.code === 11000) {
        return res.status(400).json({
          message: 'This tag is already used'
        })
      }

      return res.status(500).json({
        message: 'Could not add tag'
      })
    }
  }
  res.status(200).end()
}