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::video_livestream_v1::LivestreamServiceClient(
google::cloud::video_livestream_v1::MakeLivestreamServiceConnection(
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 for Google Cloud Services when using the C++ client libraries, which typically use Application Default Credentials."],["The latest release candidate version of the C++ client library for video-related services is 2.37.0-rc, and the current version is 2.28.0 with a list of previous version available for documentation purposes."],["You can override the default credentials by providing a `UnifiedCredentialsOption`, such as loading a service account key file, as shown in the example code snippet provided."],["Examples for overriding credentials are provided for `LivestreamServiceClient`, `VideoStitcherServiceClient`, and `TranscoderServiceClient` classes in version 2.28.0."],["The page references the best practices guide for managing service account keys and provides a link to more information on authentication components and creating `google::cloud::Credentials` objects."]]],[]]