Fetch the contents of a single file from a Github repo using Guzzle and return as a string

getGithubFile.php

<?php
use \GuzzleHttp\Client;
use \GuzzleHttp\Psr7;
use \GuzzleHttp\Exception\RequestException;

/**
 * Use guzzle to get a single file from github and return it as a string.
 *
 * @param string $url The path of the file to fetch
 * @return string
 * @throws \Exception
 */
public function fetchFileFromGithub(string $url):string
{
    try {
        $response = $this->guzzle->request('GET', $url, [
            'auth' => [
                $this->githubUser,  //<-- replace with your username
                $this->githubToken, //<-- replace with your Github Personal Access Token
            ],
            'headers' => [
                'Accept' => 'application/vnd.github.v3.raw',  //<-- This gets you the raw contents of the file.
                'User-Agent' => 'Your-Application', //<-- Github wants a user agent.
            ]
        ]);
    } catch (ClientException $e) {
        throw new \Exception('Guzzle problem: ', Psr7\Message::toString($e->getRequest()), Psr7\Message::toString($e->getResponse()));
    }


    if ($response->getStatusCode() == '200') {
        return (string) $response->getBody();
    } else {
        throw new \Exception('Guzzle bad response code');
    }
}