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::gkehub_v1::GkeHubClient(
google::cloud::gkehub_v1::MakeGkeHubConnection(options));
}
[[["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 GKE Hub client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The GKE Hub client library uses Application Default Credentials for authentication by default, but this can be overridden when needed."],["You can override the default authentication by providing the UnifiedCredentialsOption, such as loading a service account key file as shown in the provided code example."],["The example provided demonstrates a simple method to override authentication using a service account key file, but users should refer to Google Cloud's best practices guide for managing service account keys for production environments."],["The Authentication Components documentation contains further details on creating [`google::cloud::Credentials`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1Credentials.html) objects."]]],[]]
