Update app.py

app.py

@@ -1,6 +1,10 @@
 import gradio as gr
 from langchain import HuggingFaceHub, PromptTemplate, LLMChain
 from langchain.memory import ConversationBufferMemory
+import os
+
+# Get the HuggingFace API token from the environment variable
+huggingfacehub_api_token = os.environ.get("HUGGINGFACEHUB_API_TOKEN")
 
 repo_id = "tiiuae/falcon-7b-instruct"
 
@@ -22,7 +26,7 @@ def generate_response(question, huggingfacehub_api_token, temperature=0.6, max_n
 
 inputs = [
     gr.inputs.Textbox(label="Question"),
-    gr.inputs.Textbox(label="HuggingFace API Token", type="password", default=None),
+    gr.inputs.Textbox(label="HuggingFace API Token", type="password", default=huggingfacehub_api_token),
     gr.inputs.Slider(minimum=0.1, maximum=2.0, default=0.6, label="Temperature"),
     gr.inputs.Slider(minimum=100, maximum=1000, default=500, label="Max New Tokens")
 ]