MongoDB migration not working, why?

Question

MongoDB

Downloaded the migration package migrate-mongo

Configuration

const path = require('path');
const dotenv = require('dotenv').config({ path: path.resolve(__dirname, '../.env') })

const config = {
  mongodb: {
    url: dotenv.parsed.DATABASE_HOST,
    databaseName: dotenv.parsed.DB_NAME,
    options: {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    }
  },
  migrationsDir: "migrations",
  changelogCollectionName: "changelog",
  migrationFileExtension: ".js"
};

module.exports = config;

All variables and passwords are readable and 100% correct - checked.
I start , migrate-mongo upI get ERROR: Authentication failed.

In one chat, they suggested that you can write the migration mechanism yourself, but I still do not have enough information and experience. Can someone tell me how to write the migration mechanism itself.