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::workstations_v1::WorkstationsClient(
google::cloud::workstations_v1::MakeWorkstationsConnection(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 2025-05-07 UTC."],[[["This webpage provides documentation for overriding authentication credentials when using Google Cloud client libraries, specifically for workstations."],["The latest version available is `2.37.0-rc`, with a range of previous versions from `2.36.0` down to `2.11.0` also documented."],["Client libraries typically use Application Default Credentials, but the provided method demonstrates how to override this by loading a service account key file using `UnifiedCredentialsOption`."],["The example provided in the document shows how to explicitly load a service account key file to authenticate, while also pointing to a guide for best practices on service account key management."],["The document references `Authentication Components` for more in depth information on the factory functions to create `google::cloud::Credentials` objects."]]],[]]
