Add the auth token request

References #1

src/Glassboxx/Request/AuthTokenAbstractRequest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Opdavies\Glassboxx\Request;
+
+use Opdavies\Glassboxx\Config;
+use Symfony\Component\HttpClient\HttpClient;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+final class AuthTokenAbstractRequest extends AbstractRequest
+{
+    public const ENDPOINT = '/integration/admin/token';
+
+    /** @var Config */
+    private $config;
+
+    /** @var HttpClient */
+    private $client;
+
+    public function __construct(HttpClientInterface $client)
+    {
+        $this->client = $client;
+    }
+
+    public function withConfig(Config $config): self
+    {
+        $this->config = $config;
+
+        return $this;
+    }
+
+    public function getToken(): string
+    {
+        $response = $this->client
+            ->request(
+                'POST',
+                self::BASE_URL.self::ENDPOINT,
+                [
+                    'query' => [
+                        'password' => $this->config->getPassword(),
+                        'username' => $this->config->getUsername(),
+                    ],
+                ]
+            );
+
+        return json_decode($response->getContent());
+    }
+}