Update app.py

app.py

@@ -62,18 +62,22 @@ vector_store = FAISS.from_texts(
     embedding=embeddings,
     metadatas=metadatas
 )
-
 # Step 5: Initialize the LLM
-openai_api_key = os.getenv("tauhid")  # Securely access the API key from Hugging Face Secrets
+openai_api_key = os.getenv("tauhid")  # Fetch the key using the actual secret name
 if not openai_api_key:
-    raise ValueError("OPENAI_API_KEY environment variable is not set. Please add it to the Space Secrets.")
+    raise ValueError("tauhid environment variable is not set. Please add it to the Space Secrets.")
 
+# Initialize the LLM
 llm = ChatOpenAI(
     model_name="gpt-4o-mini",
     temperature=0.7,
     api_key=openai_api_key
 )
 
+# Initialize Embeddings with the same key
+embeddings = OpenAIEmbeddings(openai_api_key=openai_api_key)
+
+
 # Step 6: Set Up the RetrievalQA Chain
 retriever = vector_store.as_retriever(search_kwargs={"k": 5})
 qa_chain = RetrievalQA.from_chain_type(