Api to clear cart using node and graphql

This api used to remove all items from the cart.Here we pass the customer mail id and token .

clearCart({ CUSTOMER_EMAIL, TOKEN }) {
        return token_check.token_verify(CUSTOMER_EMAIL, TOKEN)
            .then((data) => {
                if (data == "TOKEN_INVALID" || data == "TOKEN_EXPIRED" || data == "RECORD_NOT_FOUND")
                    return { summary: { status: "SUCCESS", reason: data } };
                else if (data == "TOKEN_VALID") {
                    return order_line.findAll({
                        where: { status: { [Op.or]: ['CART', 'CHECKOUT'] }, in_checkout: 0 },
                        include: [{
                            model: customer,
                            as: "customer",
                            attributes: ['email', 'record_row_id'],
                            where: { email: CUSTOMER_EMAIL }

                        }]
                    }).then((order) => {
                        if (order[0]) {
                            return order_line.destroy({
                                where: { status: { [Op.or]: ['CART', 'CHECKOUT'] }, in_checkout: 0 },
                                include: [{
                                    model: customer,
                                    as: "customer",
                                    attributes: ['email', 'record_row_id'],
                                    where: { email: CUSTOMER_EMAIL }
                                }]
                            }).then((result) => {
                                if (result)
                                    return { summary: { status: "SUCCESS", reason: "RECORD_DELETED" } };
                                else
                                    return { summary: { status: "SUCCESS", reason: "RECORD_NOT_DELETED" } };
                            }).catch(function (error) {
                                //console.log(error);
                                return {
                                    summary: { status: "SUCCESS", reason: "RECORD_NOT_FOUND" },
                                };
                            });
                        }
                        else {
                            return { summary: { status: "SUCCESS", reason: "RECORD_NOT_FOUND" } }
                        }
                    }).catch(function (error) {
                        //console.log(error);
                        return { summary: { status: "SUCCESS", reason: "RECORD_NOT_FOUND" } };
                    });
                }
            })
            .catch(function (error) {
                // console.log(error);
                return { summary: { status: "SUCCESS", reason: "RECORD_NOT_FOUND" } };
            });
    },