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 Application Default Credentials (ADC) for authenticating with Google Cloud Services, using the `UnifiedCredentialsOption`."],["The latest version available is `2.37.0-rc`, and there is a list of previous versions including `2.15.1` all the way to `2.36.0`."],["A service account key file can be explicitly loaded to override default credentials, as demonstrated in the provided code example."],["Examples for `cloudbuild_v1::CloudBuildClient` and `cloudbuild_v2::RepositoryManagerClient` are provided to show how to override the credentials for those services."],["For managing service account keys and further information on creating `google::cloud::Credentials` objects, it is advised to consult the provided links to the best practices and authentication components respectively."]]],[]]
