Update app.py

app.py

@@ -7,8 +7,8 @@ import os
 # client = pymongo.MongoClient("mongodb://localhost:27017/")
 # db = client["todo_db"]
 
-uri = os.environ.get("user_name", None)
-uri = os.environ.get("passwd", None)
+user_name = os.environ.get("user_name", None)
+passwd = os.environ.get("passwd", None)
 uri = f"mongodb+srv://{user_name}:{passwd}@cluster0.2wsoa5b.mongodb.net/?retryWrites=true&w=majority"
 print(f"uri: {uri}")
 # Create a new client and connect to the server