Add ClientAuthenticationMethodsEnum

Author: cicnavi

src/Codebooks/ClientAuthenticationMethodsEnum.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\OpenID\Codebooks;
+
+enum ClientAuthenticationMethodsEnum: string
+{
+    case ClientSecretBasic = 'client_secret_basic';
+
+    case ClientSecretPost = 'client_secret_post';
+
+    case ClientSecretJwt = 'client_secret_jwt';
+
+    case PrivateKeyJwt = 'private_key_jwt';
+
+    case None = 'none';
+}