How to convert cURL to Guzzle GET - php

Question

First of all: First question here in Stack Overflow, quite an honor! :D
How do i convert the following curl into Guzzle?
curl -u USER_KEY:USER_SECRET https://api.apiexample.com/example/oauth/oauth?grant_type=client_credentials
I tried the following, but i kept getting 403 - Forbidden error:
$res = $client->request('GET', 'https://api.apiexample.com/example/oauth/oauth',[
'auth' => ['USER_KEY', 'USER_SECRET'],
'header' => [
'Content-Type' => 'application/x-www-form-urlencoded'
],
'form_params' => [
'grant_type' => 'client_credentials'
]
]);
What could be wrong with my code?
Edit: Forgot one thing: This request returns a token that lasts for 30 minutes. Any tip to run this function only when the token is about to expire?

Answer 1

I would recommend maybe reformatting your request by putting your constant values in the Client object declaration and also wrapping the request in a try-catch block. The try-catch block provides the added benefit that it will help you debug the response. Feel free to alter the catch statement as you wish.
$client = new Client([
'base_uri' => 'https://api.apiexample.com/example/',
'auth' => [
'USER_KEY',
'USER_SECRET'
]
]);
try {
$response = $client->request( 'GET', 'oauth/oauth', [
'headers' => [
'Content-Type' => 'application/x-www-form-urlencoded',
],
'form_params' => [
'grant_type' => 'client_credentials'
]
]);
} catch (Exception $e) {
error_log($e->getCode());
error_log($e->getMessage());
error_log(print_r($e->getTrace(), true));
}