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::dataplex_v1::CatalogServiceClient(
google::cloud::dataplex_v1::MakeCatalogServiceConnection(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 overriding default authentication credentials when using Google Cloud client libraries, specifically within the context of the Dataplex service."],["The client libraries typically rely on Application Default Credentials, but you can use `UnifiedCredentialsOption` to override this, such as by loading a service account key file."],["Versioned documentation is available from version 2.11.0 to the latest release candidate 2.37.0-rc of the C++ Dataplex client library, with links for each version to show how to override credentials."],["Examples are provided for multiple `*Client` classes within Dataplex, including `CatalogServiceClient`, `ContentServiceClient`, `DataScanServiceClient`, `DataTaxonomyServiceClient`, `DataplexServiceClient`, and `MetadataServiceClient`."],["The provided example demonstrates how to load a service account key file, but it is recommended to consult Google's guide for best practices in managing service account keys."]]],[]]
