Switching the OAuth2 lib back again

Couldn't handle the fact that the errors were being echoed from the library
and not thrown or at the very least passed back so I could use them.

src/OAuth2/ScopeStorage.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Pickles\OAuth2;
+
+use \League\OAuth2\Server\Storage\Adapter;
+use \League\OAuth2\Server\Storage\ScopeInterface;
+
+class ScopeStorage extends StorageAdapter implements ScopeInterface
+{
+    public function get($scope, $grant_type = null, $client_id = null)
+    {
+        $sql     = 'SELECT * FROM oauth_scopes WHERE id = ?;';
+        $results = $this->db->fetch($sql, [$scope]);
+
+        if (count($results) === 0)
+        {
+            return null;
+        }
+
+        return (new ScopeEntity($this->server))->hydrate([
+            'id'          => $result[0]['id'],
+            'description' => $result[0]['description'],
+        ]);
+    }
+}
+