i dont know why i use shoppingcart.users have value but when i use shoppingcart.users.id dont have value

useEffect(async () => {
  fetchShoppingCart()
}, [])



const fetchShoppingCart = async () => {
    const id = props.match.params.id
    await getShoppingCartById(id).then(response => {
        setShoppingCart(response.data)
    }).catch(error => {
        alert(error)
    })
}


return (

    <React.Fragment>

        {console.log(shoppingCart.users)}
        {console.log(shoppingCart.users.id)}

    </React.Fragment>

)

}

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