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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-08 UTC."],[[["This document provides version-specific documentation for the OrgPolicy API, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc."],["The primary topic discussed is how to override the default authentication credentials used by client libraries, which by default leverage Application Default Credentials."],["Overriding authentication can be achieved by utilizing the `UnifiedCredentialsOption` and an example is provided demonstrating the loading of a service account key file."],["The example code is simplified for clarity, and users are encouraged to refer to the \"Best practices for managing service account keys\" guide for comprehensive details on secure key management."],["The document references external resources such as \"Authentication Components\", for additional details on how to create a `google::cloud::Credentials` objects."]]],[]]
