Added entity trate

src/Entity/EntityTrait.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * OAuth 2.0 Entity trait
+ *
+ * @package     league/oauth2-server
+ * @author      Alex Bilbie <hello@alexbilbie.com>
+ * @copyright   Copyright (c) Alex Bilbie
+ * @license     http://mit-license.org/
+ * @link        https://github.com/thephpleague/oauth2-server
+ */
+
+namespace League\OAuth2\Server\Entity;
+
+trait EntityTrait
+{
+    /**
+     * Hydrate an entity with properites
+     * @param  array  $properties
+     */
+    public function hydrate(array $properties)
+    {
+        foreach ($properties as $prop) {
+            if (isset($this->{$prop})) {
+                $this->{$prop} = $prop;
+            }
+        }
+    }
+}