Update app.py

try to use secret variable for token

app.py

@@ -10,8 +10,6 @@ import os
 
 from Gradio_UI import GradioUI
 
-HF_TOKEN = os.environ['HF_TOKEN']
-
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
 def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type