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 2025-04-17 UTC."],[[["This document provides a list of available versions for overriding authentication credentials in Google Cloud Workstations, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc."],["The default authentication method for client libraries is Application Default Credentials, but the `UnifiedCredentialsOption` can be utilized for overriding this behavior."],["The example code shows how to load a service account key file to explicitly authenticate, but it should be used as a demonstration of the method and not as the best practice for production."],["The document provides links to resources such as `Authentication Components` for more details on creating `google::cloud::Credentials` objects, as well as the best practice for managing service account keys."]]],[]]
