Unless otherwise configured, the client libraries use Application Default Credentials to authenticate with Google Cloud Services. While this works for most applications, in some cases you may need to override this default. You can do so by providing the UnifiedCredentialsOption The following example shows how to explicitly load a service account key file:
[](std::string const& keyfile) {
auto is = std::ifstream(keyfile);
is.exceptions(std::ios::badbit); // Minimal error handling in examples
auto contents = std::string(std::istreambuf_iterator<char>(is.rdbuf()), {});
auto options =
google::cloud::Options{}.set<google::cloud::UnifiedCredentialsOption>(
google::cloud::MakeServiceAccountCredentials(contents));
return google::cloud::orgpolicy_v2::OrgPolicyClient(
google::cloud::orgpolicy_v2::MakeOrgPolicyConnection(options));
}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["This document provides a list of available versions for a C++ library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, with each version hyperlinked to its respective documentation."],["The guide explains how to override default authentication credentials using `UnifiedCredentialsOption`, allowing users to authenticate with Google Cloud Services through methods other than Application Default Credentials."],["An example demonstrates explicitly loading a service account key file to authenticate, which is provided as a simple and understandable method, though users are encouraged to review best practices for managing service account keys."],["The \"See Also\" section directs users to the \"Authentication Components\" documentation for more details on creating `google::cloud::Credentials` objects, offering additional information on authentication within the C++ library."]]],[]]