Discover exact POST parameters - node.js

Question

I'm trying to get data from a website that does not have an API documentation. I used selenium to login and navigate. Today I found the data I need, it appears after a post request.
There's any way I can get the exact post parameters to do it in my node program?
Data I need
edit 1:
the code that works from console browser scrap the data from the page and save a csv file:
const timeElapsed = Date.now();
const today = new Date(timeElapsed);
let updateTime;
let dataStudents = "";
let anoSerie;
let turma;
let prova;
let disciplina;
class AlunoProva {
constructor(nome, Status, anoSerie, turma, prova, disciplina, modalidadeEnsino, data) {
this.nome = nome;
this.Status = Status;
this.anoSerie = anoSerie;
this.turma = turma;
this.prova = prova;
this.disciplina = disciplina;
this.modalidadeEnsino = modalidadeEnsino;
this.data = data;
}
}
var saveData = (function () {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
return function (data, fileName) {
blob = new Blob([data], { type: "ext/csv;charset=utf-8;" }),
url = window.URL.createObjectURL(blob);
a.href = url;
a.download = fileName;
a.click();
window.URL.revokeObjectURL(url);
};
}());
const atualState = "Finalizado - Digital, Não iniciado, Em progresso - Digital"
function getTurma() {
let Turma = prompt("Informe a letra da turma atual", "A");
while (Turma == null || Turma == "") {
alert("Truma inválida! Por favor, informe uma turma válida.");
Turma = prompt("Informe a letra da turma atual", "A");
}
return Turma;
}
turma = getTurma().toUpperCase();
function getCombo(id) {
let combo = document.getElementById(id);
let dataComboSelected = combo.options[combo.selectedIndex].text;
return dataComboSelected;
}
String.prototype.hashCode = function () {
var hash = 0, i, chr;
if (this.length === 0) return hash;
for (i = 0; i < this.length; i++) {
chr = this.charCodeAt(i);
hash = ((hash << 5) - hash) + chr;
hash |= 0; // Convert to 32bit integer
}
return hash;
};
let aluno = new AlunoProva()
function dataMount(data) {
if (data !== "ESTUDANTE" && data !== "PARTICIPAÇÃO")
if (!atualState.includes(data)) {
aluno.nome = data;
dataStudents += data + ",";
}
else {
aluno.Status = data;
dataStudents += data + ",";
aluno.anoSerie = anoSerie;
dataStudents += anoSerie + ","
aluno.turma = turma;
dataStudents += turma + ","
aluno.prova = prova;
dataStudents += prova + ","
aluno.disciplina = disciplina;
dataStudents += disciplina + ","
if (anoSerie.includes("EF")) {
aluno.modalidadeEnsino = "Fundamental";
dataStudents += "Fundamental,"
}
else {
aluno.modalidadeEnsino = "Médio";
dataStudents += "Médio,"
}
aluno.data = today.toLocaleDateString();
dataStudents += today.toLocaleDateString() + "\n"
}
}
prova = getCombo('selectnn74f9d641c4DADOS.VL_FILTRO_AVALIACAO')
disciplina = getCombo('select3lw7fc885326DADOS.VL_FILTRO_DISCIPLINA')
anoSerie = getCombo('selecty0fuc3bed07cDADOS.VL_FILTRO_ETAPA')
Array.from($$("body table tr *")).forEach((el) => {
el = String(el.innerHTML)
if (el.indexOf('Atualizado') === 0) {
updateTime = el;
} else if (el.length != 0 && el != undefined) {
dataMount(el);
}
});
let hashname = (anoSerie + turma + prova + disciplina + JSON.stringify(today.toLocaleDateString())).toString();
fileName = `${anoSerie} - ${turma} - ${prova} - ${disciplina}"${hashname.hashCode()}".csv`
saveData(dataStudents, fileName);
I'm having a problem with selectors on node, just rebember that I'm not conected with the site, I'm simulating a navigation with selenium. All the frameworks I checked to help me with selectors needed that I provide an url, but I can't, the only way I found to enter the system is from selenium navigation to simulating a real user.