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vendor/google/auth/src/Credentials/InsecureCredentials.php

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+<?php
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Google\Auth\Credentials;
+
+use Google\Auth\FetchAuthTokenInterface;
+
+/**
+ * Provides a set of credentials that will always return an empty access token.
+ * This is useful for APIs which do not require authentication, for local
+ * service emulators, and for testing.
+ */
+class InsecureCredentials implements FetchAuthTokenInterface
+{
+    /**
+     * @var array{access_token:string}
+     */
+    private $token = [
+        'access_token' => ''
+    ];
+
+    /**
+     * Fetches the auth token. In this case it returns an empty string.
+     *
+     * @param callable|null $httpHandler
+     * @return array{access_token:string} A set of auth related metadata
+     */
+    public function fetchAuthToken(?callable $httpHandler = null)
+    {
+        return $this->token;
+    }
+
+    /**
+     * Returns the cache key. In this case it returns a null value, disabling
+     * caching.
+     *
+     * @return string|null
+     */
+    public function getCacheKey()
+    {
+        return null;
+    }
+
+    /**
+     * Fetches the last received token. In this case, it returns the same empty string
+     * auth token.
+     *
+     * @return array{access_token:string}
+     */
+    public function getLastReceivedToken()
+    {
+        return $this->token;
+    }
+}