add auth to the gradio

.env.template

@@ -1,3 +1,5 @@
 OPENAI_API_KEY="..."
 11LABS_API_KEY="..."
-AIML_API_KEY="..."
+AIML_API_KEY="..."
+AUTH_USERS="admin,community_user"
+AUTH_PASS="..."

app.py

@@ -1,5 +1,6 @@
 import os
 from pathlib import Path
+from typing import List
 
 import gradio as gr
 from dotenv import load_dotenv
@@ -11,6 +12,14 @@ from src.builder import AudiobookBuilder
 from src.config import logger, FILE_SIZE_MAX
 
 
+def get_auth_params() -> List[tuple[str, str]]:
+    users = os.environ["AUTH_USERS"].split(",")
+    passwords = os.environ["AUTH_PASS"].split(",")
+
+    auth_list = [(u, passwords[0] if len(passwords) == 1 else p) for u, p in zip(users, passwords)]
+    return auth_list
+
+
 def parse_pdf(file_path):
     """Parse the PDF file and return the text content."""
     loader = PyPDFLoader(file_path)
@@ -112,4 +121,4 @@ with gr.Blocks(title="Audiobooks Generation") as ui:
         outputs=error_output,
     )
 
-ui.launch()
+ui.launch(auth=get_auth_params())