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::servicehealth_v1::ServiceHealthClient(
google::cloud::servicehealth_v1::MakeServiceHealthConnection(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 2025-04-17 UTC."],[[["This page details the override authentication process for the C++ Service Health client library, specifically for versions ranging from 2.21.0 to 2.37.0-rc."],["The default authentication for the client libraries is Application Default Credentials, but they can be overridden."],["Overriding the default credentials involves using the `UnifiedCredentialsOption` by creating `google::cloud::Options` and setting the `google::cloud::UnifiedCredentialsOption`."],["A service account key file can be explicitly loaded for authentication, as demonstrated in the provided code example."],["Best practices for managing service account keys should be consulted for more details, as well as the Authentication Components documentation for creating credential objects."]]],[]]
