From bbea78dbbdf145656105fb1b749fa12a6d5c8c43 Mon Sep 17 00:00:00 2001
From: Dave Supplee <dwsupplee@gmail.com>
Date: Tue, 3 Apr 2018 11:14:25 -0400
Subject: [PATCH] Include auth cache in client documentation

---
 Spanner/src/SpannerClient.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Spanner/src/SpannerClient.php b/Spanner/src/SpannerClient.php
index 1eace127fb1d..0fb7e88afacc 100644
--- a/Spanner/src/SpannerClient.php
+++ b/Spanner/src/SpannerClient.php
@@ -34,6 +34,7 @@
 use Google\Cloud\Spanner\Connection\Grpc;
 use Google\Cloud\Spanner\Connection\LongRunningConnection;
 use Google\Cloud\Spanner\V1\SpannerClient as GapicSpannerClient;
+use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\StreamInterface;
 
 /**
@@ -100,6 +101,9 @@ class SpannerClient
      *
      *     @type string $projectId The project ID from the Google Developer's
      *           Console.
+     *     @type CacheItemPoolInterface $authCache A cache for storing access
+     *           tokens. **Defaults to** a simple in memory implementation.
+     *     @type array $authCacheOptions Cache configuration options.
      *     @type callable $authHttpHandler A handler used to deliver Psr7
      *           requests specifically for authentication.
      *     @type FetchAuthTokenInterface $credentialsFetcher A credentials