UserControllerCorrectExample.ts

import { Request, Response } from "express";
import { pool } from "database";
import { validationResult } from "express-validator";

export class UserController {
  public async create(req: Request, res: Response) {
    try {
      const errors = validationResult(req);

      if (!errors.isEmpty()) {
        return res.status(400).json({
          message: "Check the fields and try again...",
          errors: errors.array(),
        });
      }

      const addUser = await pool.query(`INSERT...`);

      if (addUser) {
        return res.status(201).json({ message: "User created successfully" });
      } else {
        return res.status(500).json({ message: "Internal server error" });
      }
    } catch (err) {
      return res.status(500).json({
        errors: {
          message: "An unknown error has occurred, please, try again later",
        },
      });
    }
  }
}