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 the Certificate Manager C++ client library, specifically detailing how to override default authentication credentials, with versions ranging from 2.11.0 to 2.37.0-rc available."],["The client libraries typically use Application Default Credentials for Google Cloud Service authentication, but this can be overridden when needed."],["Authentication can be explicitly overridden using `UnifiedCredentialsOption`, as demonstrated in the example showing how to load a service account key file."],["The example utilizes `MakeServiceAccountCredentials` to manually input a key file for service account authentication, but there are many other functions to create credentials objects."],["For more information on best practices regarding service account key management and other credentials object factory functions, refer to the linked documentation."]]],[]]
