```python
from fastapi import FastAPI
from fastapi.responses import JSONResponse
import asyncio

import helpers  # noqa: F401  (the provided API)

app = FastAPI()


@app.get("/users/{user_id}")
async def get_user(user_id: int):
    # Use the async helpers.aload_user to avoid blocking the event loop
    user = await helpers.aload_user(user_id)
    return JSONResponse(content=user, status_code=200)
```