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 document provides instructions on how to override the default Application Default Credentials (ADC) when authenticating with Google Cloud Services."],["The method for overriding authentication involves using the `UnifiedCredentialsOption` and can be demonstrated with the example of loading a service account key file."],["Links to examples for `cloudbuild_v1::CloudBuildClient` and `cloudbuild_v2::RepositoryManagerClient` are provided for reference on other client classes."],["The document lists versions ranging from 2.11.0 up to 2.36.0 with 2.37.0-rc as the most recent, that all have authentication overrides."],["This page also links to additional information regarding service account key management and authentication components."]]],[]]