added username and password

app.py

@@ -4,7 +4,10 @@ import gradio as gr
 from typing import Any, Callable
 import contextvars
 from uw_programmatic.uw_machine import UWMachine
+from dotenv import load_dotenv
+import os
 
+load_dotenv()
 
 def run_with_context(func: Callable) -> Callable:
     ctx = contextvars.copy_context()
@@ -17,7 +20,7 @@ def run_with_context(func: Callable) -> Callable:
 
 def generate_questions(
     page_lower, page_higher, question_number, taxonomy
-) -> tuple[str, dict[str, Any]]:
+) -> tuple[str, dict[str, Any],dict[str, Any]]:
     if machine.value and machine.value.current_state_value == "start":
         machine.value.start_machine()  # Start the machine!
     if not question_number or question_number <= 0:
@@ -63,6 +66,9 @@ def generate_questions(
         gr.update(
             visible=True, value=f"{Path.cwd().joinpath('outputs/professor_guide.xlsx')}"
         ),
+        gr.update(
+            interactive=False
+        )
     )
 
 
@@ -74,6 +80,9 @@ def create_statemachine() -> None:
         machine.value = UWMachine.from_config_file(config_path)
     except Exception as e:
         raise gr.Error(str(e)) from e
+    
+def questions_downloaded() -> dict[str,Any]:
+    return gr.update(interactive=True)
 
 
 with gr.Blocks() as demo:
@@ -108,7 +117,17 @@ with gr.Blocks() as demo:
     start_button.click(
         fn=run_with_context(generate_questions),
         inputs=[page_lower, page_higher, question_number, taxonomy],
-        outputs=[output, download_professor],
+        outputs=[output, download_professor, start_button],
+    )
+    download_professor.click(
+        fn=run_with_context(questions_downloaded),
+        outputs=[start_button]
     )
-# TODO: Add a username and password here.
-demo.launch()
+username = os.getenv('HF_USERNAME','')
+password = os.getenv('HF_PASSWORD','')
+if username != '' and password != '':
+    demo.launch(auth=(username,password))
+else:
+    with gr.Blocks() as failed:
+        gr.Markdown("Environment Error - No username and password provided")
+    failed.launch()