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."],[[["The latest version available is 2.37.0-rc, with multiple prior versions, such as 2.36.0, 2.35.0, and so on, all the way down to 2.11.0, each with specific documentation pages."],["The client libraries use Application Default Credentials to authenticate with Google Cloud Services unless configured otherwise, and overriding is possible."],["Authentication can be overridden by providing a `UnifiedCredentialsOption`, as demonstrated by loading a service account key file in the example code snippet."],["Examples for overriding authentication are provided for `cloudbuild_v1::CloudBuildClient` and `cloudbuild_v2::RepositoryManagerClient` classes, both accessible via links."],["For details about creating `google::cloud::Credentials` objects, refer to the Authentication Components page."]]],[]]
