Improve auth process 4

services/tenant/app/main.py

@@ -8,7 +8,7 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 from app.core.config import settings
-from app.core.database import engine
+from app.core.database import database_manager
 from app.api import tenants
 from shared.monitoring.logging import setup_logging
 from shared.monitoring.metrics import MetricsCollector
@@ -51,7 +51,7 @@ async def startup_event():
 async def shutdown_event():
     """Cleanup on shutdown"""
     logger.info("Shutting down Tenant Service...")
-    await engine.dispose()
+    await database_manager.engine.dispose()
 
 @app.get("/health")
 async def health_check():