Client
ServiceCheckout exposes one method to create a client (createClient)
import { checkout } from './lib'
const createClient = async () => { checkout.addClient = { birthDate: '23/10/1994', email: 'fran17901@gmail.com', iban: 'ES34 3453 3455 3455 3455', identificationDocument: '77818881K', identificationType: 'NIF', name: 'Fran', phone: '666666666', secondSurname: 'Meseguer', surname: 'Garcia', } const newClient = await checkout.createClient()}