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 various versions of the gkemulticloud C++ client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The default authentication for the client libraries utilizes Application Default Credentials, but you can override this by employing `UnifiedCredentialsOption`."],["You can provide explicit service account key file credentials for authentication using `UnifiedCredentialsOption` by loading them from the file."],["Examples for overriding authentication credentials are provided for `AttachedClustersClient`, `AwsClustersClient`, and `AzureClustersClient` classes."],["The best practices for managing service account keys can be found in a separate guide, with more details on the authentication components available in the linked documentation."]]],[]]
