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::cloudcontrolspartner_v1::
CloudControlsPartnerCoreClient(
google::cloud::cloudcontrolspartner_v1::
MakeCloudControlsPartnerCoreConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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 details how to override the default authentication credentials used by client libraries, which typically rely on Application Default Credentials."],["You can override the default credentials by using the `UnifiedCredentialsOption` and providing alternative authentication, such as loading a service account key file."],["The `cloudcontrolspartner_v1::CloudControlsPartnerCoreClient` and `cloudcontrolspartner_v1::CloudControlsPartnerMonitoringClient` are examples given on the site, demonstrating how to explicitly set credentials."],["Version 2.37.0-rc is the most recent release candidate, while the list of versions on the site go as far back as 2.23.0."],["For best practices regarding service account keys, there is a guide included as reference, as well as another reference for the factory functions to create `google::cloud::Credentials` objects."]]],[]]
