Update app.py

udpated the code after creting new secret key

app.py

@@ -1,7 +1,10 @@
 import gradio as gr
 from huggingface_hub import InferenceClient
+import os
 
-
+# Retrieve the token from an environment variable
+token = os.getenv("PA_HF_TOKEN")
+client = InferenceClient(model="gpt2", token=token)
 
 def generate_response(prompt):
     response = client.text_generation(prompt)
@@ -16,10 +19,10 @@ with gr.Blocks() as demo:
     # Output component
     output = gr.Textbox(label="AI response")
 
-     # Button to trigger generation
+    # Button to trigger generation
     submit_btn = gr.Button("Submit")
-   # Button to trigger generation
-    submit_btn.click(generate_response, inputs=msg, outputs=output)
 
-demo.launch()
+    # Link the button to the function
+    submit_btn.click(generate_response, inputs=msg, outputs=output)
 
+demo.launch()