Mongodb + Atlas: 'bad auth Authentication failed.', code: 8000,

I've tried this and it's not working.

I have the following error with Mongodb + Atlas:

MongoError: bad auth Authentication failed.    at /Users/cyrus/Documents/Code/01. Code/Franklin-ford/franklin-ford-server/node_modules/mongodb-core/lib/auth/auth_provider.js:46:25    at /Users/cyrus/Documents/Code/01. Code/Franklin-ford/franklin-ford-server/node_modules/mongodb-core/lib/auth/scram.js:215:18    at Connection.messageHandler (/Users/cyrus/Documents/Code/01. Code/Franklin-ford/franklin-ford-server/node_modules/mongodb-core/lib/connection/connect.js:334:5)    at Connection.emit (events.js:203:13)    at processMessage (/Users/cyrus/Documents/Code/01. Code/Franklin-ford/franklin-ford-server/node_modules/mongodb-core/lib/connection/connection.js:364:10)    at TLSSocket.<anonymous> (/Users/cyrus/Documents/Code/01. Code/Franklin-ford/franklin-ford-server/node_modules/mongodb-core/lib/connection/connection.js:533:15)    at TLSSocket.emit (events.js:203:13)    at addChunk (_stream_readable.js:295:12)    at readableAddChunk (_stream_readable.js:276:11)    at TLSSocket.Readable.push (_stream_readable.js:210:10)    at TLSWrap.onStreamRead (internal/stream_base_commons.js:166:17) {  ok: 0,  errmsg: 'bad auth Authentication failed.',  code: 8000,  codeName: 'AtlasError',  name: 'MongoError',  [Symbol(mongoErrorContextSymbol)]: {}

Here's how I instantiate my DB:

From the credentials.js:

const config = {    mongoConnectionURL: "mongodb://cyruslk:<MY_PASS_HERE>@franklinford-shard-00-00-3dveb.mongodb.net:27017,franklinford-shard-00-01-3dveb.mongodb.net:27017,franklinford-shard-00-02-3dveb.mongodb.net:27017/test?ssl=true&replicaSet=FranklinFord-shard-0&authSource=admin&retryWrites=true&w=majority",    mongoDatabaseName: "FranklinFord",  }

From my main server.js app:

const {MongoClient} = require("mongodb");const connectionURL = config.mongoConnectionURL;const databaseName = config.mongoDatabaseName;  let sendToDb = (dataToInsert) => {    MongoClient.connect(connectionURL, {      useNewUrlParser: true,    }, (error, client) => {      if(error){        console.log(error);        return console.log("Unable to connect to the db.");      }      const db = client.db(databaseName);      console.log(db);      db.collection("ford_twitter").insertOne({        masterData: dataToInsert      }, (error, result) => {        if(error){          return console.log("unable to insert users");        }        console.log("Data successfully inserted");      })    })  }

You can find the code here

Thanks for helping me. I have no idea what's happening.