fixed login link not showing

src/auth.py

@@ -135,7 +135,7 @@ def save_credentials(creds, project_id=None):
         json.dump(creds_data, f, indent=2)
     
 
-def get_credentials():
+def get_credentials(allow_oauth_flow=True):
     """Loads credentials matching gemini-cli OAuth2 flow."""
     global credentials, credentials_from_env, user_project_id
     
@@ -365,6 +365,11 @@ def get_credentials():
             logging.error(f"Failed to read credentials file {CREDENTIAL_FILE}: {e}")
             # Fall through to new login only if file is completely unreadable
 
+    # Only start OAuth flow if explicitly allowed
+    if not allow_oauth_flow:
+        logging.info("OAuth flow not allowed - returning None (credentials will be required on first request)")
+        return None
+
     client_config = {
         "installed": {
             "client_id": CLIENT_ID,
@@ -387,6 +392,12 @@ def get_credentials():
         prompt="consent",
         include_granted_scopes='true'
     )
+    print(f"\n{'='*80}")
+    print(f"AUTHENTICATION REQUIRED")
+    print(f"{'='*80}")
+    print(f"Please open this URL in your browser to log in:")
+    print(f"{auth_url}")
+    print(f"{'='*80}\n")
     logging.info(f"Please open this URL in your browser to log in: {auth_url}")
     
     server = HTTPServer(("", 8080), _OAuthCallbackHandler)

src/main.py

@@ -37,20 +37,57 @@ app.add_middleware(
 async def startup_event():
     try:
         logging.info("Starting Gemini proxy server...")
-        creds = get_credentials()
-        if creds:
+        
+        # Check if credentials exist
+        import os
+        from .config import CREDENTIAL_FILE
+        
+        env_creds_json = os.getenv("GEMINI_CREDENTIALS")
+        creds_file_exists = os.path.exists(CREDENTIAL_FILE)
+        
+        if env_creds_json or creds_file_exists:
             try:
-                proj_id = get_user_project_id(creds)
-                if proj_id:
-                    onboard_user(creds, proj_id)
-                    logging.info(f"Successfully onboarded with project ID: {proj_id}")
-                logging.info("Gemini proxy server started successfully")
-                logging.info("Authentication required - Password: see .env file")
+                # Try to load existing credentials without OAuth flow first
+                creds = get_credentials(allow_oauth_flow=False)
+                if creds:
+                    try:
+                        proj_id = get_user_project_id(creds)
+                        if proj_id:
+                            onboard_user(creds, proj_id)
+                            logging.info(f"Successfully onboarded with project ID: {proj_id}")
+                        logging.info("Gemini proxy server started successfully")
+                        logging.info("Authentication required - Password: see .env file")
+                    except Exception as e:
+                        logging.error(f"Setup failed: {str(e)}")
+                        logging.warning("Server started but may not function properly until setup issues are resolved.")
+                else:
+                    logging.warning("Credentials file exists but could not be loaded. Server started - authentication will be required on first request.")
             except Exception as e:
-                logging.error(f"Setup failed: {str(e)}")
-                logging.warning("Server started but may not function properly until setup issues are resolved.")
+                logging.error(f"Credential loading error: {str(e)}")
+                logging.warning("Server started but credentials need to be set up.")
         else:
-            logging.error("Could not obtain credentials. Please authenticate and restart the server.")
+            # No credentials found - prompt user to authenticate
+            logging.info("No credentials found. Starting OAuth authentication flow...")
+            try:
+                creds = get_credentials(allow_oauth_flow=True)
+                if creds:
+                    try:
+                        proj_id = get_user_project_id(creds)
+                        if proj_id:
+                            onboard_user(creds, proj_id)
+                            logging.info(f"Successfully onboarded with project ID: {proj_id}")
+                        logging.info("Gemini proxy server started successfully")
+                    except Exception as e:
+                        logging.error(f"Setup failed: {str(e)}")
+                        logging.warning("Server started but may not function properly until setup issues are resolved.")
+                else:
+                    logging.error("Authentication failed. Server started but will not function until credentials are provided.")
+            except Exception as e:
+                logging.error(f"Authentication error: {str(e)}")
+                logging.warning("Server started but authentication failed.")
+        
+        logging.info("Authentication required - Password: see .env file")
+        
     except Exception as e:
         logging.error(f"Startup error: {str(e)}")
         logging.warning("Server may not function properly.")