async def METHOD_NAME(item_id: str, x_token: str = Header(...)):  # noqa: B008
    if x_token != fake_secret_token:
        raise HTTPException(status_code=401, detail="Invalid X-Token header")
    if item_id not in fake_db:
        raise HTTPException(status_code=404, detail="Item not found")
    return fake_db[item_id]