Update main.py

main.py

@@ -58,7 +58,7 @@ def response_generator(query):
         huggingfacehub_api_token=hf_api_key,
         model_kwargs=model_kwargs
     )
-    qa = ConversationalRetrievalChain.from_llm(hf, retriever=vector_store.as_retriever(search_kwargs={"score_threshold": 0.6, "k": 3,"filter": {"user": username}}), memory=memory, verbose=True, return_source_documents=True)
+    qa = ConversationalRetrievalChain.from_llm(hf, retriever=vector_store.as_retriever(search_kwargs={"score_threshold": 0.6, "k": 4,"filter": {"user": username}}), memory=memory, verbose=True, return_source_documents=True)
     
     # Generate model's response 
     model_response = qa({"question": query})