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::certificatemanager_v1::CertificateManagerClient(
google::cloud::certificatemanager_v1::MakeCertificateManagerConnection(
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."],[[["This page provides documentation for various versions of the CertificateManager, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The client libraries default to using Application Default Credentials for authentication with Google Cloud Services, but can be overridden."],["To override default authentication, the `UnifiedCredentialsOption` can be set with service account credentials, as demonstrated in the example that loads a service account key file."],["For details on creating `google::cloud::Credentials` objects, see the Authentication Components section."],["Review the \"Best practices for managing service account keys\" guide for more in-depth information on handling service account keys."]]],[]]
