collection name change

utils.py

@@ -38,7 +38,7 @@ embeddings = OpenAIEmbeddings(model='text-embedding-ada-002')
 
 message_history = CustomMongoDBChatMessageHistory(
     connection_string=MONGO_DB_URL, session_id='session_id', database_name='coursera_bots',
-    collection_name='3d_printing_revolution'
+    collection_name='3d_printing_applications'
 )
 
 memory = ConversationBufferWindowMemory(memory_key="chat_history", k=10)
@@ -68,7 +68,7 @@ def set_session_id(session_id):
         print("Setting session id to " + str(session_id))
         message_history = CustomMongoDBChatMessageHistory(
             connection_string=MONGO_DB_URL, session_id=session_id, database_name='coursera_bots',
-            collection_name='printing_3d_revolution'
+            collection_name='printing_3d_applications'
         )
         memory = ConversationBufferWindowMemory(memory_key="chat_history", chat_memory=message_history, k=10,
                                                 return_messages=True)