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::assuredworkloads_v1::AssuredWorkloadsServiceClient(
google::cloud::assuredworkloads_v1::
MakeAssuredWorkloadsServiceConnection(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 page documents the history of `assuredworkloads-override-authentication` versions, ranging from version 2.11.0 to the latest release candidate, 2.37.0-rc."],["The default authentication for client libraries uses Application Default Credentials, but these can be overridden when needed."],["You can override the default authentication by providing the `UnifiedCredentialsOption`, with an example shown of loading a service account key file."],["The `Authentication Components` link provides further information on factory functions to create `google::cloud::Credentials` objects."]]],[]]
