MongoDB return Error with code 13 and description Unauthorized

Question

I use NodeChef Cloud platform to upload my NodeJS project with MongoDB database

I connect to DB with connection string in this format:

mongodb://user:pass@host:port/database_name

After deploy I try to get data from DB, but Mongo return error like this:

{
    "operationTime": "6962418569824960513",
    "ok": 0,
    "code": 13,
    "codeName": "Unauthorized",
    ...
    "name": "MongoError"
}

MongoDB version is 4.0.3

To connect to DB in project I use NodeJS lib mongod and code like this:

const MongoClient = require('mongodb').MongoClient;

MongoClient.connect(process.env.DATABASE_URI, (err, database) => {

});