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::automl_v1::AutoMlClient(
google::cloud::automl_v1::MakeAutoMlConnection(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 provides documentation for overriding default authentication credentials when using Google Cloud C++ client libraries for AutoML, covering versions from 2.11.0 up to the latest release candidate 2.37.0-rc."],["The client libraries typically use Application Default Credentials for authentication, but users can override this by utilizing the UnifiedCredentialsOption to specify credentials, such as loading a service account key file."],["Examples are provided to demonstrate how to use service account credentials with both the `automl_v1::AutoMlClient` and `automl_v1::PredictionServiceClient` classes, illustrating the process for overriding default authentication."],["The page references external resources, such as the Best practices guide for managing service account keys and the Authentication Components documentation, for more comprehensive information."]]],[]]
