Update app.py

app.py

@@ -74,6 +74,47 @@ import json
 import uuid
 import os
 import re
+import sys
+import subprocess
+from typing import Dict, Any, List
+
+# Setup Logging
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
+
+
+
+
+def check_gcloud_auth():
+    """Checks for GCP authentication and provides instructions if missing."""
+    try:
+        # The 'gcloud auth print-access-token' command is a reliable way to check for active credentials.
+        # We capture stderr to suppress the verbose output on success.
+        subprocess.check_output("gcloud auth application-default print-access-token", shell=True, stderr=subprocess.DEVNULL)
+        logging.info("GCP authentication credentials found.")
+        return True
+    except subprocess.CalledProcessError:
+        error_message = """
+================================================================================
+CRITICAL ERROR: Google Cloud Authentication Not Found!
+================================================================================
+This application requires authentication to access Google Cloud services (Vertex AI, Cloud Storage).
+
+To fix this, please run the following command in your terminal and follow the prompts to log in with your Google account:
+
+    gcloud auth application-default login
+
+After authenticating, please restart this Python script.
+================================================================================
+"""
+        print(error_message, file=sys.stderr)
+        return False
+
+# Run the auth check before trying to import heavy libraries
+if not check_gcloud_auth():
+    sys.exit(1)
+
+
+
 from typing import Dict, Any
 import gradio as gr
 import vertexai