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 2025-03-21 UTC."],[[["The latest release candidate version is 2.37.0-rc, and other versions available are from 2.21.0 up to 2.36.0."],["Client libraries primarily use Application Default Credentials for authenticating with Google Cloud Services."],["You can override the default authentication credentials using `UnifiedCredentialsOption`, such as by loading a service account key file."],["The provided example demonstrates loading a service account key file, but users should refer to the \"Best practices for managing service account keys\" guide for comprehensive information."],["For more details on creating `google::cloud::Credentials` objects, refer to the \"Authentication Components\" documentation."]]],[]]
