Update app.py

app.py

@@ -13,10 +13,14 @@ from dotenv import load_dotenv
 import uuid
 
 
-# Google Books API setup
-os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "/home/user/app/audiobookagent-aaf910cd6329.json"
-google_api_key = os.getenv("AIzaSyDOxfDDznu39CSWR3wlGK-eEV2XH2zoGf4")
-books_service = build("books", "v1", developerKey=google_api_key)
+# Google Books API setup with Service Account
+json_key_path: str = "/app/audiobookagent-aaf910cd6329.json"  # Adjust path for Hugging Face Spaces
+os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = json_key_path
+credentials = service_account.Credentials.from_service_account_file(
+    json_key_path,
+    scopes=["https://www.googleapis.com/auth/books"]
+)
+books_service = build("books", "v1", credentials=credentials)