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 2025-03-05 UTC."],[[["This webpage provides documentation for overriding default authentication credentials when using Google Cloud client libraries, specifically for the DLP service, with a focus on C++ implementations."],["The latest version available for the DLP service is 2.37.0-rc, and the page includes links to documentation for multiple previous versions, dating back to 2.11.0."],["By utilizing `UnifiedCredentialsOption`, users can override the default Application Default Credentials and specify custom credentials, such as those from a service account key file."],["The example code shows how to load credentials from a service account key file using `MakeServiceAccountCredentials` and setting it within the `Options` for the DLP service client."],["The content directs users to the \"Best practices for managing service account keys\" and \"Authentication Components\" guides for more information on managing service account keys and creating credentials objects, respectively."]]],[]]