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 method for the client libraries is Application Default Credentials, but users can override this behavior when necessary."],["Users can override authentication by utilizing the UnifiedCredentialsOption to load credentials, such as from a service account key file, which is demonstrated in the provided example code."],["Examples of how to override authentication credentials for `gkemulticloud_v1::AttachedClustersClient`, `gkemulticloud_v1::AwsClustersClient`, and `gkemulticloud_v1::AzureClustersClient` are available."],["For detailed information on creating `google::cloud::Credentials` objects, users can consult the Authentication Components documentation."]]],[]]