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::gkebackup_v1::BackupForGKEClient(
google::cloud::gkebackup_v1::MakeBackupForGKEConnection(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 2025-03-21 UTC."],[[["This webpage provides documentation for various versions of the `gkebackup` service, ranging from version 2.12.0 up to the latest release candidate 2.37.0-rc."],["The content explains how to override the default authentication credentials, which are typically Application Default Credentials, when interacting with Google Cloud services."],["You can override authentication by utilizing the `UnifiedCredentialsOption` and providing a service account key file, as demonstrated in the provided C++ example."],["The provided example shows how to load a service account key file and create a `BackupForGKEClient` with custom authentication."],["For more information on creating `google::cloud::Credentials` objects and managing service account keys, refer to the linked documentation on Authentication Components and best practices."]]],[]]
