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::policytroubleshooter_iam_v3::
PolicyTroubleshooterClient(
google::cloud::policytroubleshooter_iam_v3::
MakePolicyTroubleshooterConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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 the Policy Troubleshooter service, with versions ranging from 2.11.0 to the latest release candidate, 2.37.0-rc."],["The client libraries primarily use Application Default Credentials for authentication, but you can override this by setting the `UnifiedCredentialsOption`."],["The provided example demonstrates how to load a service account key file and use it for authentication within the `PolicyTroubleshooterClient`."],["Examples for other `*Client` classes, specifically `policytroubleshooter_iam_v3::PolicyTroubleshooterClient` and `policytroubleshooter_v1::IamCheckerClient` are provided in the links."],["For further details on managing service account keys, and creating `google::cloud::Credentials`, there are external links provided for best practices and authentication components."]]],[]]
