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::advisorynotifications_v1::
AdvisoryNotificationsServiceClient(
google::cloud::advisorynotifications_v1::
MakeAdvisoryNotificationsServiceConnection(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 2025-03-14 UTC."],[[["This page provides documentation for various versions of the Advisory Notifications service, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The content demonstrates how to override the default authentication credentials using `UnifiedCredentialsOption` by explicitly loading a service account key file, as an example for a relatively easy to understand case."],["The documentation recommends consulting the \"Best practices for managing service account keys\" guide for more comprehensive details on key management."],["The default authentication method used by the client libraries is the Application Default Credentials, unless you change it with `UnifiedCredentialsOption`."],["You can find additional information on the factory functions for creating `google::cloud::Credentials` objects in the Authentication Components section."]]],[]]
