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 2025-03-05 UTC."],[[["This page provides documentation for the GKE Multi-Cloud C++ client library, covering versions from 2.11.0 up to the latest release candidate 2.37.0-rc."],["The client libraries default to using Application Default Credentials for authentication with Google Cloud Services, but this can be overridden if necessary."],["You can override the default authentication by providing the `UnifiedCredentialsOption`, such as loading credentials from a service account key file, as demonstrated in the provided example code."],["Examples of how to override authentication for different client classes like `AttachedClustersClient`, `AwsClustersClient`, and `AzureClustersClient` are provided."],["For best practices and more in depth details on service account keys, refer to the \"Best practices for managing service account keys\" and the \"Authentication Components\" documentation."]]],[]]
