// String required

body('name')
  .trim()
  .not().isEmpty()
    .withMessage('This field is required')
  .isString()
    .withMessage('This field must be an string')

// Email required

body('email')
  .trim()
  .isEmail()
    .withMessage('Must be a valid email address')
  .normalizeEmail()

// Example:

const express = require('express')
const adminController = require('../controllers/admin')
const { body } = require('express-validator/check')

const router = express.Router()

router.post('/insert', [
  body('name')
    .trim()
    .not().isEmpty()
      .withMessage('This field is required')
    .isString()
      .withMessage('This field must be an string'),
  body('lastName')
    .trim()
    .not().isEmpty()
      .withMessage('This field is required')
    .isString()
      .withMessage('This field must be an string'),
  body('email')
    .trim()
    .isEmail()
      .withMessage('Must be a valid email address')
    .normalizeEmail()
], adminController.createEmailsToSend)