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::dlp_v2::DlpServiceClient(
google::cloud::dlp_v2::MakeDlpServiceConnection(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 2025-03-14 UTC."],[[["This page provides documentation for various versions of the Data Loss Prevention (DLP) service, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The documentation focuses on how to override default authentication credentials in the client libraries, which typically use Application Default Credentials."],["You can override authentication by providing a UnifiedCredentialsOption, such as loading a service account key file, as demonstrated in the provided code example."],["The example uses a service account key file, it also shows how to use the `UnifiedCredentialsOption` function, and the `DlpServiceClient` function."],["Users are encouraged to review the \"Best practices for managing service account keys\" guide and the \"Authentication Components\" for more information on managing service account keys and creating `google::cloud::Credentials` objects."]]],[]]
