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 document provides information on how to override the default authentication credentials used by the client libraries, which typically rely on Application Default Credentials."],["You can override the default credentials by using the `UnifiedCredentialsOption` and providing specific credentials, such as loading a service account key file."],["The latest version available is 2.37.0-rc, and this page also provides access to other versions ranging from 2.36.0 to 2.23.0."],["Examples of overriding authentication for `CloudControlsPartnerCoreClient` and `CloudControlsPartnerMonitoringClient` are provided, with a link to best practices for managing service account keys."],["The document provides a \"see also\" link, directing users to find more information about factory functions that create the `google::cloud::Credentials` objects."]]],[]]
