Updated the file in response to the PR comment

API/database.py

@@ -2,13 +2,14 @@
 from datetime import datetime
 from pymongo import MongoClient
 
+
 class Database:
     def __init__(self, uri="mongodb://localhost:27017/", db_name="ImageDB"):
         self.client = MongoClient(uri)
         self.db = self.client[db_name]
 
     def find(self, collection, query=None):
-        return list(self.db[collection].find(query))
+        return self.db[collection].find(query)
 
     def insert_one(self, collection, document):
         return self.db[collection].insert_one(document)
@@ -19,5 +20,5 @@ def find_one(self, collection, filter, projection=None):
     def find_one_and_delete(self, collection, query):
         return self.db[collection].find_one_and_delete(query)
 
-    def update_one(self, collection, query, update):
-        return self.db[collection].update_one(filter=query, update=update)
+    def update_one(self, collection, query, update, upsert=False):
+        return self.db[collection].update_one(query, update, upsert=upsert)