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::asset_v1::AssetServiceClient(
google::cloud::asset_v1::MakeAssetServiceConnection(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 2025-03-05 UTC."],[[["This page provides documentation for various versions of the C++ Asset API, ranging from version 2.11.0 up to the release candidate 2.37.0-rc, with version 2.29.0 as the current version."],["The client libraries utilize Application Default Credentials for Google Cloud service authentication unless you configure them otherwise."],["You can override default credentials by supplying the `UnifiedCredentialsOption`, demonstrated through loading a service account key file."],["The example demonstrates how to load a service account key file with basic error handling, and we recommend that you read the 'Best practices for managing service account keys' guide for more information."],["The 'Authentication Components' link offers more information on generating `google::cloud::Credentials` objects through factory functions."]]],[]]