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 webpage 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 primary focus of the content is on how to override the default authentication credentials, allowing users to use methods other than Application Default Credentials (ADC)."],["Users can override default authentication by using `UnifiedCredentialsOption` and setting it with `MakeServiceAccountCredentials` using a service account key file."],["The provided example code demonstrates how to load credentials from a service account key file, which is then used to create a `CertificateManagerClient`."],["Additional information about authentication components, including factory functions for `google::cloud::Credentials` objects, can be found in the Authentication Components documentation."]]],[]]
