node-express-mongodb-jwt-rest-api-skeleton/app/controllers/auth/helpers/findUserById.js

Node.js express.js MongoDB JWT REST API - This is a basic API REST skeleton written on JavaScript using async/await. Great for building a starter web API for your front-end (Android, iOS, Vue, react, angular, or anything that can consume an API)

const User = require('../../../models/user')
const { itemNotFound } = require('../../../middleware/utils')

/**
 * Finds user by ID
 * @param {string} id - user´s id
 */
const findUserById = (userId = '') => {
  return new Promise((resolve, reject) => {
    User.findById(userId, async (err, item) => {
      try {
        await itemNotFound(err, item, 'USER_DOES_NOT_EXIST')
        resolve(item)
      } catch (error) {
        reject(error)
      }
    })
  })
}

module.exports = { findUserById }