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::ContentServiceClient(
google::cloud::dataplex_v1::MakeContentServiceConnection(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 various versions of the Dataplex C++ client library, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc."],["The client libraries primarily use Application Default Credentials for authentication, but they allow for overriding this default behavior when necessary."],["You can override the default authentication method by utilizing the `UnifiedCredentialsOption` and providing a service account key file to authenticate, as shown in the example."],["Examples for other client classes such as `ContentServiceClient`, `DataplexServiceClient`, and `MetadataServiceClient` are available for reference on how to apply the service account authentication."],["The documentation links to resources that will explain more details on managing service account keys and the `google::cloud::Credentials` object."]]],[]]
