curl --request POST \
  --url https://api.shoppex.io/dev/v1/oauth/token \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data grant_type=authorization_code \
  --data code=shoa_code_1 \
  --data redirect_uri=https://erp.example.com/callback \
  --data client_id=shoc_demo \
  --data client_secret=shcs_secret

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({
    grant_type: 'authorization_code',
    code: 'shoa_code_1',
    redirect_uri: 'https://erp.example.com/callback',
    client_id: 'shoc_demo',
    client_secret: 'shcs_secret'
  })
};

fetch('https://api.shoppex.io/dev/v1/oauth/token', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.shoppex.io/dev/v1/oauth/token"

payload = {
    "grant_type": "authorization_code",
    "code": "shoa_code_1",
    "redirect_uri": "https://erp.example.com/callback",
    "client_id": "shoc_demo",
    "client_secret": "shcs_secret"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/x-www-form-urlencoded"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.shoppex.io/dev/v1/oauth/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 => "grant_type=authorization_code&code=shoa_code_1&redirect_uri=https%3A%2F%2Ferp.example.com%2Fcallback&client_id=shoc_demo&client_secret=shcs_secret",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/x-www-form-urlencoded"
  ],
]);

$response = curl_exec($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.shoppex.io/dev/v1/oauth/token"

	payload := strings.NewReader("grant_type=authorization_code&code=shoa_code_1&redirect_uri=https%3A%2F%2Ferp.example.com%2Fcallback&client_id=shoc_demo&client_secret=shcs_secret")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

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

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

	fmt.Println(string(body))

}

{
  "access_token": "shpat_access_1",
  "token_type": "Bearer",
  "expires_in": 3600,
  "refresh_token": "shprt_refresh_1",
  "scope": "orders.read customers.read"
}