added optional mongo client for already configured monitors

src/monitor_utils/database.py

@@ -29,17 +29,23 @@ NO_MSRP_PRIORITY = 6
 NEW_LISTING_PRIORITY = 6
 
 
-def get_collection(collection_name: str) -> AsyncIOMotorCollection:
+def get_collection(
+    collection_name: str, mongo_client: AsyncIOMotorClient = None
+) -> AsyncIOMotorCollection:
     """Return the named collection from the shared client's database.
 
     Args:
         collection_name: Name of the collection to return.
+        mongo_client: optional client for projects with already configured client
 
     Returns:
         The requested collection.
     """
 
-    return get_mongo_client()[MONGO_DATABASE_NAME][collection_name]
+    if mongo_client is None:
+        mongo_client = get_mongo_client()
+
+    return mongo_client[MONGO_DATABASE_NAME][collection_name]
 
 
 def resolve_alerts_collection(