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 2025-03-21 UTC."],[[["The latest release candidate version is 2.37.0-rc, with numerous previous versions of Dataplex documentation available, starting from version 2.11.0, all of which override authentication credentials."],["Client libraries typically use Application Default Credentials for Google Cloud Services, but users can override this by utilizing `UnifiedCredentialsOption` to load a service account key file."],["The provided example demonstrates how to explicitly load a service account key file, which is done through the `google::cloud::UnifiedCredentialsOption` setting, as seen with the `MakeServiceAccountCredentials` function."],["There are several `*Client` classes that have examples on how to use service account credentials with the `UnifiedCredentialsOption`, including `CatalogServiceClient`, `ContentServiceClient`, `DataScanServiceClient`, `DataTaxonomyServiceClient`, `DataplexServiceClient`, and `MetadataServiceClient`."],["The documentation has links to guides on managing service account keys and also to authentication components, which can assist with creating `google::cloud::Credentials` objects."]]],[]]
