convert everything to string

app.py

@@ -22,8 +22,12 @@ def authenticate_and_generate(token, message, history, system_message, max_token
     # Initialize the text-generation pipeline with the provided token
     text_generator = pipeline("text-generation", model="microsoft/Phi-3-mini-4k-instruct", use_auth_token=hf_token, trust_remote_code=True)
     
+    # Ensure that system_message is a string
+    system_message = str(system_message)
+    
     # Construct the prompt with system message, history, and user input
-    prompt = system_message + "\n" + "\n".join([f"User: {msg[0]}\nAssistant: {msg[1]}" for msg in history if msg[0] and msg[1]])
+    history_str = "\n".join([f"User: {str(msg[0])}\nAssistant: {str(msg[1])}" for msg in history if str(msg[0]) and str(msg[1])])
+    prompt = system_message + "\n" + history_str
     prompt += f"\nUser: {message}\nAssistant:"
 
     # Generate a response using the model