added endpoint for getting one template

src/Api/Templates.php

@@ -15,6 +15,7 @@
 use Mailgun\Assert;
 use Mailgun\Model\Domain\CreateResponse;
 use Mailgun\Model\Templates\GetResponse;
+use Mailgun\Model\Templates\ShowResponse;
 use Psr\Http\Client\ClientExceptionInterface;
 use Psr\Http\Message\ResponseInterface;
 
@@ -55,6 +56,23 @@ public function get(string $domain, int $limit, string $page, string $pivot, arr
         return $this->hydrateResponse($response, GetResponse::class);
     }
 
+    /**
+     * @param string $domain
+     * @param string $templateId
+     * @param array $requestHeaders
+     * @return mixed|ResponseInterface
+     * @throws ClientExceptionInterface
+     */
+    public function show(string $domain, string $templateId, array $requestHeaders = [])
+    {
+        Assert::notEmpty($domain);
+        Assert::notEmpty($templateId);
+
+        $response = $this->httpGet(sprintf('/v3/%s/templates/%s', $domain, $templateId), [], $requestHeaders);
+
+        return $this->hydrateResponse($response, ShowResponse::class);
+    }
+
 
 
     /**

src/Model/Templates/ShowResponse.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
+namespace Mailgun\Model\Templates;
+
+use Mailgun\Model\ApiResponse;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class ShowResponse extends Template implements ApiResponse
+{
+}

src/Model/Templates/Template.php

@@ -37,13 +37,14 @@ private function __construct()
      */
     public static function create(array $data): self
     {
+        $template = $data['template'] ?? $data;
         $model = new self();
 
-        $model->setId($data['id']);
-        $model->setName($data['name']);
-        $model->setDescription($data['description'] ?? '');
-        $model->setCreatedAt($data['createdAt'] ?? '');
-        $model->setCreatedBy($data['createdBy'] ?? '');
+        $model->setId($template['id']);
+        $model->setName($template['name']);
+        $model->setDescription($template['description'] ?? '');
+        $model->setCreatedAt($template['createdAt'] ?? '');
+        $model->setCreatedBy($template['createdBy'] ?? '');
 
         return $model;
     }