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 2025-03-05 UTC."],[[["This page details how to override the default Application Default Credentials (ADC) used by client libraries for authenticating with Google Cloud Services."],["You can override the default authentication by providing a `UnifiedCredentialsOption`, such as loading a service account key file, as demonstrated in the provided example."],["The latest release candidate for the cloudcontrolspartner is version 2.37.0-rc, and it lists various versions of this resource going as far back as 2.23.0."],["Examples are available for `cloudcontrolspartner_v1::CloudControlsPartnerCoreClient` and `cloudcontrolspartner_v1::CloudControlsPartnerMonitoringClient`, showing how to apply the service account key method."],["Refer to the provided links for further information, such as best practices for managing service account keys and details on creating `google::cloud::Credentials` objects."]]],[]]