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::webrisk_v1::WebRiskServiceClient(
google::cloud::webrisk_v1::MakeWebRiskServiceConnection(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 2025-05-07 UTC."],[[["The latest version available is 2.37.0-rc, with numerous other versions, starting at 2.36.0 and going all the way down to 2.11.0."],["The documentation explains how to override the default authentication credentials by using the `UnifiedCredentialsOption` when the standard `Application Default Credentials` are not suitable."],["You can manually load a service account key file by providing the path to a file containing the credentials with `google::cloud::MakeServiceAccountCredentials(contents)`."],["The provided code snippet demonstrates how to load a service account key file, although the documentation recommends referring to the \"Best practices for managing service account keys\" guide for comprehensive information."],["For more information on creating `google::cloud::Credentials` objects, consult the `Authentication Components` documentation."]]],[]]
