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::cloudbuild_v1::CloudBuildClient(
google::cloud::cloudbuild_v1::MakeCloudBuildConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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 2025-03-05 UTC."],[[["This page details how to override the default authentication credentials for Google Cloud client libraries, which typically use Application Default Credentials."],["You can override the default authentication by providing the `UnifiedCredentialsOption`, as demonstrated using a service account key file example."],["The provided content contains links to versioned documentation for the Cloud Build client libraries ranging from version 2.11.0 up to 2.37.0-rc."],["Examples for other `*Client` classes, including `cloudbuild_v1::CloudBuildClient` and `cloudbuild_v2::RepositoryManagerClient`, are available for overriding credentials."],["For comprehensive guidance on service account key management, the \"Best practices for managing service account keys\" guide is recommended, along with the linked \"Authentication Components\" documentation."]]],[]]