curl --request POST \
  --url https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --header 'password: <password>' \
  --header 'realm: <realm>' \
  --header 'username: <username>' \
  --data '
{
  "client_id": "<string>",
  "client_secret": "<string>"
}
'

import requests

url = "https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token"

payload = {
    "client_id": "<string>",
    "client_secret": "<string>"
}
headers = {
    "Content-Type": "<content-type>",
    "Authorization": "<authorization>",
    "username": "<username>",
    "password": "<password>",
    "realm": "<realm>"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Content-Type': '<content-type>',
    Authorization: '<authorization>',
    username: '<username>',
    password: '<password>',
    realm: '<realm>'
  },
  body: JSON.stringify({client_id: '<string>', client_secret: '<string>'})
};

fetch('https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'client_id' => '<string>',
    'client_secret' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <authorization>",
    "Content-Type: <content-type>",
    "password: <password>",
    "realm: <realm>",
    "username: <username>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token"

	payload := strings.NewReader("{\n  \"client_id\": \"<string>\",\n  \"client_secret\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "<content-type>")
	req.Header.Add("Authorization", "<authorization>")
	req.Header.Add("username", "<username>")
	req.Header.Add("password", "<password>")
	req.Header.Add("realm", "<realm>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token")
  .header("Content-Type", "<content-type>")
  .header("Authorization", "<authorization>")
  .header("username", "<username>")
  .header("password", "<password>")
  .header("realm", "<realm>")
  .body("{\n  \"client_id\": \"<string>\",\n  \"client_secret\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://apicorp.algartelecom.com.br/oauth-portal/oauth-portal/access-token")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = '<content-type>'
request["Authorization"] = '<authorization>'
request["username"] = '<username>'
request["password"] = '<password>'
request["realm"] = '<realm>'
request.body = "{\n  \"client_id\": \"<string>\",\n  \"client_secret\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "access_token": "string",
  "token_type": "string",
  "expires_in": 0
}

{
  "error": "Invalid credentials"
}

{
  "error": "Unauthorized: Invalid token or expired session"
}