@rubenskuhl boa noite tudo bão? Tu sabe porque retorna : 
{
  code: 3500034,
  error: 'validation_error',
  error_description: {
    property: '/id',
    message: 'Tipo inválido: string (esperado integer).'
  }
}
apartir daqui : 
js
    const responseCobranca = await efipay.createCharge([], chargeInput);
    const cobrancaId = parseInt(responseCobranca.data.charge_id);  
    const pagamentoCartao = {
      payment: {
        credit_card: {
          customer: {
            name: "Gorbadoc Oldbuck",
            cpf: "94271564656",
            email: "
[email protected]",
            birth: "1990-08-29",
            phone_number: "5144916523"
          },
          installments: 1,
          payment_token: "",
          billing_address: {
            street: "Avenida Juscelino Kubitschek",
            number: "909",
            neighborhood: "Bauxita",
            zipcode: "35400000",
            city: "Ouro Preto",
            complement: "",
            state: "MG"
          }
        }
      }
    };  
    const responseDefinePayMethod = await efipay.definePayMethod([], pagamentoCartao);
estou tentando adicionar um metodo de cartão ao pagamento