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 2025-03-05 UTC."],[[["This webpage provides documentation for the Certificate Manager, specifically detailing how to override default authentication credentials when interacting with Google Cloud Services."],["The latest version of the documentation is version 2.37.0-rc, but various versions ranging from 2.11.0 up to the latest are available for review."],["By default, client libraries use Application Default Credentials (ADC), but authentication can be overridden using the `UnifiedCredentialsOption`."],["The provided example demonstrates overriding authentication by explicitly loading a service account key file using `google::cloud::MakeServiceAccountCredentials`."],["For managing service account keys and more information on the factory functions to create `google::cloud::Credentials`, users can refer to the provided documentation links."]]],[]]