Connect to AWS Document DB using SSH Tunnel in python

database.py

from sshtunnel import SSHTunnelForwarder
from pymongo import MongoClient

ssh_tunnel_host = 'our-ec2-hostname.compute-1.amazonaws.com'
ssh_tunnel_port = 22
ssh_tunnel_user = 'ubuntu'
ssh_tunnel_pkey = 'ec2-hostname.pem'

db_user = 'database-user'
db_pass = 'database-pass'
db_host = 'documentdb-cluster-endpoint'
db_port = 27017
db_pkey = 'rds-ca-2019-us-east-1.pem'


server = SSHTunnelForwarder(
    (ssh_tunnel_host, 22),
    ssh_username=ssh_tunnel_user,
    ssh_pkey=ssh_tunnel_pkey,
    remote_bind_address=(db_host, 27017),
    local_bind_address=('127.0.0.1', 27017)
)
server.start()

db_uri = f'mongodb://{db_user}:{db_pass}@127.0.0.1:{db_port}'

client = MongoClient(db_uri)
database = client['test']