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::kms_inventory_v1::KeyDashboardServiceClient(
google::cloud::kms_inventory_v1::MakeKeyDashboardServiceConnection(
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 2025-03-05 UTC."],[[["This document details how to override the default Application Default Credentials (ADC) used by client libraries for authenticating with Google Cloud Services."],["You can override the default credentials by providing a `UnifiedCredentialsOption`, as demonstrated by the example showing how to load a service account key file."],["The document provides links to specific examples of overriding credentials for various `*Client` classes, including `KeyDashboardServiceClient`, `KeyTrackingServiceClient`, `AutokeyAdminClient`, `AutokeyClient`, `EkmServiceClient`, and `KeyManagementServiceClient`."],["The document features a list of previous versions starting from 2.37.0-rc to 2.10.1."],["The best practices guide for managing service account keys is available for further details, and there is a section with a link to the Authentication Components for more information on creating `google::cloud::Credentials` objects."]]],[]]
