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::gkemulticloud_v1::AttachedClustersClient(
google::cloud::gkemulticloud_v1::MakeAttachedClustersConnection(
"us-west1" /* regional service region */, 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 2025-03-14 UTC."],[[["This page provides documentation for overriding default authentication credentials when using Google Cloud client libraries, specifically focusing on GKE Multi-Cloud services."],["The latest version available is 2.37.0-rc, while version 2.11.0 is presented in the examples to showcase how to override authentication credentials."],["The default authentication method utilizes Application Default Credentials, but the documentation details how to override this with a service account key file using `UnifiedCredentialsOption`."],["Examples are provided for `AttachedClustersClient`, `AwsClustersClient`, and `AzureClustersClient` classes within the `gkemulticloud_v1` namespace, demonstrating the override authentication process."],["The provided content emphasizes understanding and utilizing the `UnifiedCredentialsOption` and to consult Google Cloud documentation for best practices in managing service account keys."]]],[]]