curl --request POST \
  --url https://api.payrollintegrationsapp.com/v1/auth/token \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "grantType": "client_credentials"
}
'

import requests

url = "https://api.payrollintegrationsapp.com/v1/auth/token"

payload = { "grantType": "client_credentials" }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({grantType: 'client_credentials'})
};

fetch('https://api.payrollintegrationsapp.com/v1/auth/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://api.payrollintegrationsapp.com/v1/auth/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([
    'grantType' => 'client_credentials'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://api.payrollintegrationsapp.com/v1/auth/token"

	payload := strings.NewReader("{\n  \"grantType\": \"client_credentials\"\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.payrollintegrationsapp.com/v1/auth/token")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"grantType\": \"client_credentials\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.payrollintegrationsapp.com/v1/auth/token")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"grantType\": \"client_credentials\"\n}"

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

{
  "accessToken": "eyJhbGciOiJSUzI1NiIsImtpZCI6Ik1UY3pOVEkyTnpnNU1ERT0ifQ.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.VGhpc0lzQVJhbmRvbVNpZ25hdHVyZVRoYXRJc05vdFZhbGlkQW5kU2hvdWxkTm90QmVVc2VkSW5Qcm9kdWN0aW9uRW52aXJvbm1lbnRzVGhpc0lzQU1vY2tFeGFtcGxlRm9yRG9jdW1lbnRhdGlvblB1cnBvc2VzT25seVBsZWFzZUdlbmVyYXRlWW91ck93blJlYWxUb2tlbkZyb21Db2duaXRvSW5Qcm9kdWN0aW9uRW52aXJvbm1lbnRzTm90VGhpc0V4YW1wbGU",
  "expiresIn": 900,
  "tokenType": "Bearer",
  "access_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6Ik1UY3pOVEkyTnpnNU1ERT0ifQ.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.VGhpc0lzQVJhbmRvbVNpZ25hdHVyZVRoYXRJc05vdFZhbGlkQW5kU2hvdWxkTm90QmVVc2VkSW5Qcm9kdWN0aW9uRW52aXJvbm1lbnRzVGhpc0lzQU1vY2tFeGFtcGxlRm9yRG9jdW1lbnRhdGlvblB1cnBvc2VzT25seVBsZWFzZUdlbmVyYXRlWW91ck93blJlYWxUb2tlbkZyb21Db2duaXRvSW5Qcm9kdWN0aW9uRW52aXJvbm1lbnRzTm90VGhpc0V4YW1wbGU",
  "expires_in": 900,
  "token_type": "Bearer"
}

{
  "message": "<string>",
  "errors": [
    "<string>"
  ]
}

{
  "message": "<string>",
  "errors": [
    "<string>"
  ]
}

{
  "message": "<string>",
  "errors": [
    "<string>"
  ]
}

{
  "message": "<string>",
  "errors": [
    "<string>"
  ]
}