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 details how to override the default authentication credentials for Google Cloud services, which typically use Application Default Credentials."],["The latest release candidate version is 2.37.0-rc, with the most recent stable version being 2.36.0, and there are several versions available that are listed."],["Overriding the default credentials can be accomplished by using the `UnifiedCredentialsOption` and providing a service account key file, as shown in the provided example code."],["Examples for `cloudbuild_v1::CloudBuildClient` and `cloudbuild_v2::RepositoryManagerClient` are provided, demonstrating how to apply service account credentials to them."],["The provided documentation links to the `Authentication Components` page for more information on creating [`google::cloud::Credentials`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Credentials.html) and it is recommended to check out the best practices for managing service account keys."]]],[]]
