Configuring the application for a database user

To configure an application to use the newly created database user, proceed as follows:

1. We start by creating a simple application that reads the name and address for the first user in the biglittle database:

import pprint
from pymongo import MongoClient
client = MongoClient('localhost');
find_result = client.biglittle.users.find_one({},{"name":1,"address":1})
pprint.pprint(find_result)

2. As the database is now configured to require authentication, we expect this application to fail, as seen in the following screenshot:

3. We then modify the initial client connection to include a reference to the database user with least privileges:

import pprint
from pymongo import MongoClient
client = MongoClient(
    'localhost', 
    username='biglittle_reader',
    password='password',
    authSource='biglittle',
    authMechanism='SCRAM-SHA-256');
find_result = client.biglittle.users...