I am using following code to read the data from mongoDB using Databricks

from pyspark.sql import SparkSession
spark = SparkSession \
.builder \
.appName("myApp") \
.config("spark.mongodb.connection.uri", "mongodb+srv://username:password@cluster.xxxx.mongodb.net/database.collection") \
.getOrCreate()

df = spark.read.format("mongo").load()