Improve user delete flow

services/auth/app/api/users.py

@@ -7,6 +7,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from typing import Dict, Any
 import structlog
 import uuid
+from datetime import datetime, timezone
 
 from app.core.database import get_db
 from app.schemas.auth import UserResponse, PasswordChange
@@ -120,7 +121,7 @@ async def update_current_user(
             detail="Failed to update user"
         )
 
-@router.delete("/delete/users/{user_id}")
+@router.delete("/delete/{user_id}")
 async def delete_admin_user(
     user_id: str,
     background_tasks: BackgroundTasks,
@@ -158,35 +159,83 @@ async def delete_admin_user(
             detail="Cannot delete your own account"
         )
     
-    # Initialize deletion service
+    # Quick validation that user exists before starting background task
     deletion_service = AdminUserDeleteService(db)
-    
-    # Perform the deletion
-    try:
-        result = await deletion_service.delete_admin_user_complete(
-            user_id=user_id,
-            requesting_user_id=current_user.id
-        )
-        
-        return {
-            "success": True,
-            "message": f"Admin user {user_id} has been successfully deleted",
-            "deletion_details": result
-        }
-        
-    except HTTPException:
-        raise
-    except Exception as e:
-        logger.error("Unexpected error during user deletion", 
-                    user_id=user_id, 
-                    error=str(e))
+    user_info = await deletion_service._validate_admin_user(user_id)
+    if not user_info:
         raise HTTPException(
-            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
-            detail="An unexpected error occurred during user deletion"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Admin user {user_id} not found"
         )
+    
+    # Start deletion as background task for better performance
+    background_tasks.add_task(
+        execute_admin_user_deletion,
+        user_id=user_id,
+        requesting_user_id=current_user.id,
+        db_url=str(db.bind.url)  # Pass DB connection string for background task
+    )
+    
+    return {
+        "success": True,
+        "message": f"Admin user deletion for {user_id} has been initiated",
+        "status": "processing",
+        "user_info": user_info,
+        "initiated_at": datetime.utcnow().isoformat(),
+        "note": "Deletion is processing in the background. Check logs for completion status."
+    }
+
+# Add this background task function to services/auth/app/api/users.py:
+
+async def execute_admin_user_deletion(
+    user_id: str, 
+    requesting_user_id: str, 
+    db_url: str
+):
+    """
+    Background task to execute complete admin user deletion
+    """
+    # Create new database session for background task
+    from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
+    from sqlalchemy.orm import sessionmaker
+    
+    engine = create_async_engine(db_url)
+    async_session = sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+    
+    async with async_session() as session:
+        try:
+            # Initialize deletion service with new session
+            deletion_service = AdminUserDeleteService(session)
+            
+            # Perform the deletion
+            result = await deletion_service.delete_admin_user_complete(
+                user_id=user_id,
+                requesting_user_id=requesting_user_id
+            )
+            
+            logger.info("Background admin user deletion completed successfully", 
+                       user_id=user_id,
+                       requesting_user=requesting_user_id,
+                       result=result)
+            
+        except Exception as e:
+            logger.error("Background admin user deletion failed", 
+                        user_id=user_id,
+                        requesting_user=requesting_user_id,
+                        error=str(e))
+            
+            # Attempt to publish failure event
+            try:
+                deletion_service = AdminUserDeleteService(session)
+                await deletion_service._publish_user_deletion_failed_event(user_id, str(e))
+            except:
+                pass
+        
+        finally:
+            await engine.dispose()
 
 
-@router.get("/delete/users/{user_id}/deletion-preview")
+@router.get("/delete/{user_id}/deletion-preview")
 async def preview_user_deletion(
     user_id: str,
     current_user = Depends(get_current_user_dep),