Fix set_page_config issue

app.py

@@ -144,11 +144,11 @@ def call_hf_inference(
 # ---------------------
 
 def main():
-    if not authenticate():
-        st.stop()  # or just `return` to end early
-        
     st.set_page_config(page_title="CVI-GPT", layout="centered")
     st.title("CVI-GPT: Conversational Interface")
+    
+    if not authenticate():
+        st.stop()  # or just `return` to end early
 
     # ---------------------
     # Sidebar: Model & Params