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app.py

@@ -113,7 +113,7 @@ for msg in st.session_state['MEMORY'].chat_memory.messages:
 prompt = st.chat_input(placeholder='Your input here')
 
 ### 5. Process the query received from user
-if prompt:
+if prompt and openai_api_key:
 
     # Write the user prompt as chat message
     st.chat_message('user').write(prompt)