Update app.py

Author: rachel-mack

app.py

@@ -9,15 +9,16 @@
 from typing_extensions import Annotated
 
 from bson import ObjectId
-import motor.motor_asyncio
+import asyncio
+from pymongo import AsyncMongoClient
 from pymongo import ReturnDocument
 
 
 app = FastAPI(
     title="Student Course API",
     summary="A sample application showing how to use FastAPI to add a ReST API to a MongoDB collection.",
 )
-client = motor.motor_asyncio.AsyncIOMotorClient(os.environ["MONGODB_URL"])
+client = AsyncMongoClient(os.environ["MONGODB_URL"])
 db = client.college
 student_collection = db.get_collection("students")