Typeerror: Cannot read Property 'findOne' of Undefined (strapi)

Question

I am creating an eCommerce using Strapi, but I have a problem in one of the routes that makes the POST. Summarizing this route she opens a payment session, and for that I step one request.body with the type of product that will be purchased, the method called for this is the findOne(). But when I make the request, instead of seeing the answer, it comes undefined.

Follow the code here:

async create(ctx) {

    const {
        product
    } = ctx.request.body

    if (!product) {
        return ctx.throw(400, 'please especiefiede de product')
    }

    const realProduct = await strapi.services.product.findOne({
        id: product.id
    })
    if (!realProduct) {
        return ctx.throw(404, 'No product with such id')
    }


    const {
        user
    } = ctx.state
    const BASE_URL = ctx.request.headers.origin || 'http:localhost:3000'

    const session = await stripe.checkout.sessions.create({
        payment_method_types: ['card'],
        costumer_email: user.email,
        mode: 'payment',
        success_url: `${BASE_URL}/success?session_id={CHECKOUT_SESSION_ID}`,
        cancel_url: BASE_URL,
        line_items: [{
                price_data: {
                    currency: 'brl',
                    product_data: {
                        name: realProduct.meProd
                    },
                    unit_amount: fromDecimalToInt(realProduct.price),
                },
                quatity: 1
            }

        ]
    })

    //aqui criar a ordem
    const newOrder = await stripe.services.order.create({
        user: user.id,
        product: realProduct.id,
        total: realProduct.price,
        status: 'unpaid',
        checkout_session: session.id

    })

    return {
        id: session.id
    }

}

What matters only goes up to the realProduct.