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."],[[["This page documents how to override the default authentication credentials used by the client libraries when interacting with Google Cloud Services, which typically rely on Application Default Credentials."],["You can override the default credentials by utilizing the `UnifiedCredentialsOption`, as demonstrated in the provided example that shows how to explicitly load a service account key file."],["The latest version is 2.37.0-rc, and there are listed documentation links for a number of prior versions going all the way back to version 2.11.0."],["The listed links direct to examples of how to override authentication for several `*Client` classes within the `dataplex_v1` namespace, including `CatalogServiceClient`, `ContentServiceClient`, and `DataScanServiceClient`, among others."],["For more details on managing service account keys or creating `google::cloud::Credentials` objects, consult the linked best practices guide and authentication components documentation, respectively."]]],[]]
