Add AccessTokenTypesEnum

Author: cicnavi

src/Codebooks/AccessTokenTypesEnum.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\OpenID\Codebooks;
+
+enum AccessTokenTypesEnum: string
+{
+    // https://www.iana.org/assignments/oauth-parameters/oauth-parameters.xhtml#token-types
+    case Bearer = 'Bearer';
+    case N_A = 'N_A';
+    case PoP = 'PoP';
+    case DPoP = 'DPoP';
+}