Mongoose insertion order - node.js

Question

I am a very beginner at APIs. I am trying to create a test API for my upcoming website but I am stuck at some point. I used SQL, and I am used to orders when inserting data into the database. While using MongoDB and the mongoose library at insertion the pre-made Schema's order lost after inserting data.
This is my model file for the user.
const mongoose = require("mongoose")
const UserSchema = mongoose.Schema({
username: {
type: String,
require: true,
minlength: 6,
maxlength: 64
},
password: {
type: String,
require: true,
minlength: 6,
maxlength: 255
},
email: {
verified: {type: Boolean, default: false},
type: String,
require: true,
minlength: 11,
maxlength: 64
},
description: {
type: String,
require: true,
minlength: 20,
maxlength: 5000
},
permissions: {
verified: {type: Boolean, default: false, require:true},
admin: {type: Boolean, default: false, require:true},
server: {type: Number, default: 0, require:true}
},
image: {
type: String,
require: true,
default: ""
},
reg_date: {
type: Date,
default: Date.now(),
require: true
}
});
module.exports = mongoose.model("User", UserSchema);
The body of the POST request:
{
"username": "nameblabla",
"email": "email#email.com",
"description": "akjfhajkléfhakaklsfhak-sfn-ak.sfnkl-asfnkléas-f",
"password": "pasfgasgasdg"
}
And the file of the POST request:
const express = require('express')
const router = express.Router();
const userModel = require('../models/User')
//VALIDATION
const joi = require('#hapi/joi');
const schema = joi.object({
username: joi.string().min(6).required(),
email: joi.string().min(6).required().email(),
description: joi.string().min(20).required(),
password: joi.string().min(6).required()
});
router.post('/signup', async (req,res) => {
//VALIDATE
const {error} = schema.validate(req.body, {abortEarly: false});
if(error){
let msg = ""
error.details.forEach(e => {
msg += e.message + "\n";
});
return res.status(400).send(msg)
}else{
const user = new userModel({
username: req.body.username,
email: req.body.email,
description: req.body.description,
password: req.body.password
});
try{
const savedUser = await user.save();
res.send(savedUser)
}catch(err) {
res.status(400).send(err);
}
}
})
module.exports = router
The inserted data looks like:
{
"permissions": {
"verified": false,
"admin": false,
"server": 0
},
"image": "",
"reg_date": "2020-04-06T14:50:02.910Z",
"_id": "5e8b41a0cddf023104955793",
"username": "Miraglia1",
"email": "email#email.com",
"description": "akjfhajkléfhakaklsfhak-sfn-ak.sfnkl-asfnkléas-f",
"password": "pasfgasgasdg",
"__v": 0
}
So when I save the data the default key:value pairs placed above the submitted data. But is there any solution to keep the Schema order? Please help me.
Thanks in advance. :)