Added lib-secret-manager which consumes secrets after application launch

src/rabbitmq_handler.py

@@ -1,7 +1,7 @@
 import asyncio
 import aio_pika
 from aio_pika.exceptions import AMQPException
-from secret_handler import return_credentials
+from secret_manager import return_credentials
 import os
 from simple_logger_handler import setup_logger
 import json