My local MongoDB is refusing to connect with AWS SAM Lambda in python

I have set up an AWS Lambda function using the AWS SAM app. I have also downloaded local MongoDB on my machine. I am trying to make a connection between AWS Lambda and MongoDB. You can see my code below:

import json
import pymongo
client = pymongo.MongoClient('mongodb://localhost:27017/')
mydb = client['Employee']

def lambda_handler(event, context):
    information = mydb.employeeInformation
    record = {
        'FirstName' : 'Rehan',
        'LastName' : 'CH',
        'Department' : "IT" 
    }
    information.insert_one(record)
    print("Record added")

    return {
        "statusCode": 200,
        "body": json.dumps(
            {
                "message": "hello world",
                # "location": ip.text.replace("\n", "")
             }
    ),
}

When I run the sam app using command

sam local invoke

it throws an error that you can see below:

[ERROR] ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused, Timeout: 30s, Topology Description: <TopologyDescription id: 62b16aa14a95a3e56eb0e7cb, topology_type: Unknown, servers: [<ServerDescription ('localhost', 27017) server_type: Unknown, rtt: None, error=AutoReconnect('localho    raise ServerSelectionTimeoutError(, line 227, in _select_servers_looprtn_support

I also have searched for this error and eventually, I found some but didn't get help from them. That's why I have to post it again.

Its my first time interaction with MongoDB. Can someone tell me how do I resolve this error, or where I am doing wrong?