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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis document provides a reference for different versions of the \u003ccode\u003eorgpolicy-override-authentication\u003c/code\u003e feature, ranging from version 2.11.0 to 2.37.0-rc, with links to documentation for each version.\u003c/p\u003e\n"],["\u003cp\u003eThe client libraries by default utilize Application Default Credentials for authenticating with Google Cloud Services, but this behavior can be overridden.\u003c/p\u003e\n"],["\u003cp\u003eTo override default authentication, you can use the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e to specify credentials explicitly, such as loading a service account key file as demonstrated in the example code.\u003c/p\u003e\n"],["\u003cp\u003eThe document provides links to other helpful resources to aid in understanding this process, including the best practices for managing service account keys, and the Authentication Components page.\u003c/p\u003e\n"]]],[],null,[]]
