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 the `gkemulticloud` service."],["The latest available release candidate is version 2.37.0-rc, with multiple previous versions listed down to 2.11.0, all of which are linked to their respective documentation."],["Overriding authentication is done using the `UnifiedCredentialsOption`, as shown in the provided code snippet, which demonstrates how to load a service account key file."],["Examples of overriding the credentials for the following client classes are provided: `gkemulticloud_v1::AttachedClustersClient`, `gkemulticloud_v1::AwsClustersClient`, and `gkemulticloud_v1::AzureClustersClient`."],["For more information on managing service accounts you can see the link to the best practices guide and the Authentication components link will provide you with more information on `google::cloud::Credentials` objects."]]],[]]