FunctionProject/api/controllers/categories.js

const errorHandling = require('../assets/utils/errorHandling')
const Categories = require('../models/categories')
const { serverError } = require('../assets/config/errors')

exports.getCategories = (_req, res, next) => {
  Categories.findAll()
    .then(result => {
      res.status(200).json(result)
    })
    .catch(error => {
      console.log(error)
      return errorHandling(next, serverError)
    })
}