set global error wrapper

gistfile1.txt

objective: we want to remove the duplicates error we have in our routes i.e in the catch block of every route since they are all thesame we want to create a middleware that will dirrect such errors directely to our global error handler
steps:
1 create a new file may in your utils folder and called it anything
2 we will use this code snippet which is just a middleware that resolve a promise

module.exports = fn => {
  return (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next);
};

3 next we will import this into all our routes and use it like this:
const catchAsync = require('../utils/catchAsync');
3a remove the try and catch you have in all the routes and have something like this
 exports.signup = catchAsync(async (req, res, next) => {
  const user = await Users.create(req.body);
 // this here can be any error  but we remove the error in the catch block completely because this middleware will do the work for us
  sendToken(user, res, 201);
});