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::beyondcorp_appconnections_v1::
AppConnectionsServiceClient(
google::cloud::beyondcorp_appconnections_v1::
MakeAppConnectionsServiceConnection(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 2025-03-14 UTC."],[[["This page provides documentation for overriding default authentication credentials in the Google Cloud C++ client libraries for BeyondCorp services, with the latest release candidate version being 2.37.0-rc."],["The client libraries primarily use Application Default Credentials for authentication, but developers can override this by supplying a `UnifiedCredentialsOption`, demonstrated with an example of loading a service account key file."],["Examples are given for how to perform this credential override on various `*Client` classes, such as `AppConnectionsServiceClient`, `AppConnectorsServiceClient`, and `AppGatewaysServiceClient`, along with links to these in version 2.26.0."],["The documentation provides links to best practices for managing service account keys and further information on authentication components used to create `google::cloud::Credentials` objects."]]],[]]