From b61a9764a9d953d2b214edb2b543b8df42fbfa06 Mon Sep 17 00:00:00 2001
From: BenWhitehead <BenWhitehead@users.noreply.github.com>
Date: Thu, 27 Jul 2023 15:04:24 -0400
Subject: [PATCH] fix(grpc): return error if credentials are detected to be
 null (#2142)

---
 .../main/java/com/google/cloud/storage/GrpcStorageOptions.java  | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java b/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
index 8bb3115c52..a6aa331350 100644
--- a/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
+++ b/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
@@ -48,6 +48,7 @@
 import com.google.cloud.storage.UnifiedOpts.UserProject;
 import com.google.cloud.storage.spi.StorageRpcFactory;
 import com.google.common.base.MoreObjects;
+import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import com.google.storage.v2.ReadObjectRequest;
@@ -169,6 +170,7 @@ private Tuple<StorageSettings, Opts<UserProject>> resolveSettingsAndOpts() throw
 
     Opts<UserProject> defaultOpts = Opts.empty();
     CredentialsProvider credentialsProvider;
+    Preconditions.checkState(credentials != null, "Unable to resolve credentials");
     if (credentials instanceof NoCredentials) {
       credentialsProvider = NoCredentialsProvider.create();
     } else {