Fix OAuth integration: Add LoginButton back and update function signature for proper HF Spaces deployment

app.py

@@ -28,14 +28,21 @@ class BasicAgent:
         return fixed_answer
 
 
-def run_and_submit_all(*args):
+def run_and_submit_all(profile: gr.OAuthProfile | None = None):
     """
     Fetches all questions, runs the BasicAgent on them, submits all answers,
     and displays the results.
     """
     # Determine HF Space Runtime URL and Repo URL
     space_id = os.getenv("SPACE_ID", "unknown_space")
-    username = os.getenv("HF_USER", "anonymous")
+    
+    if profile:
+        username = f"{profile.username}"
+        print(f"User logged in: {username}")
+    else:
+        print("User not logged in, using anonymous.")
+        username = "anonymous"
+
     print(f"Running as user: {username}")
 
     api_url = DEFAULT_API_URL
@@ -109,9 +116,13 @@ with gr.Blocks() as demo:
         """
         **Instructions:**
 
-        Click 'Run Evaluation & Submit All Answers' to fetch, run the agent, and submit.
+        1. Login to Hugging Face using the button below (required for submission)
+        2. Click 'Run Evaluation & Submit All Answers' to fetch, run the agent, and submit.
         """
     )
+    
+    gr.LoginButton()
+    
     run_button = gr.Button("Run Evaluation & Submit All Answers")
     status_output = gr.Textbox(label="Run Status / Submission Result", lines=5, interactive=False)
     results_table = gr.DataFrame(label="Questions and Agent Answers", wrap=True)