Override the Default Universe Domain

In some cases, you may need to override the default universe domain used by the client library. Use AddUniverseDomainOption when initializing the client library to change this default.

  namespace gcs = ::google::cloud::storage;
  [](std::string const& bucket_name, std::string const& object_name) {
    google::cloud::Options options;

    // AddUniverseDomainOption interrogates the UnifiedCredentialsOption, if
    // set, in the provided Options for the Universe Domain associated with the
    // credentials and adds it to the set of Options.
    // If no UnifiedCredentialsOption is set, GoogleDefaultCredentials are used.
    auto ud_options =
        google::cloud::AddUniverseDomainOption(std::move(options));

    if (!ud_options.ok()) throw std::move(ud_options).status();
    auto client = gcs::Client(*ud_options);
    PerformSomeOperations(client, bucket_name, object_name);
  }