curl --request POST \
  --url https://auth.interactsms.com/token \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data username=your_username \
  --data password=your_strong_password \
  --data client_id=ismstoken \
  --data grant_type=password

import requests

url = "https://auth.interactsms.com/token"

payload = {
    "username": "your_username",
    "password": "your_strong_password",
    "client_id": "ismstoken",
    "grant_type": "password"
}
headers = {"Content-Type": "application/x-www-form-urlencoded"}

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

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://auth.interactsms.com/token");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddParameter("username", "your_username");
request.AddParameter("password", "your_strong_password");
request.AddParameter("client_id", "ismstoken");
request.AddParameter("grant_type", "password");
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

HttpResponse<String> response = Unirest.post("https://auth.interactsms.com/token")
  .header("Content-Type", "application/x-www-form-urlencoded")
  .body("username=your_username&password=your_strong_password&client_id=ismstoken&grant_type=password")
  .asString();

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://auth.interactsms.com/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 => "username=your_username&password=your_strong_password&client_id=ismstoken&grant_type=password",
  CURLOPT_HTTPHEADER => [
    "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;
}

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/x-www-form-urlencoded'},
  body: new URLSearchParams({
    username: 'your_username',
    password: 'your_strong_password',
    client_id: 'ismstoken',
    grant_type: 'password'
  })
};

fetch('https://auth.interactsms.com/token', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJE...",
  "expires_in": 120,
  "refresh_expires_in": 1200,
  "refresh_token": "eyJhbGciOiJIUzUxMiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJh...",
  "token_type": "Bearer",
  "scope": "email profile client_id"
}

{
  "error": "invalid_grant",
  "error_description": "Invalid user credentials"
}