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 provides documentation for overriding default authentication credentials when using Google Cloud services, specifically for video-related APIs in C++."],["The latest version documented is 2.37.0-rc, with historical versions listed down to 2.11.0, all with information for overriding authentication."],["Client libraries generally use Application Default Credentials, but users can override this by using the `UnifiedCredentialsOption` and providing service account key file."],["The page provides example code for explicitly loading a service account key file, utilizing `MakeServiceAccountCredentials` to create `UnifiedCredentialsOption`."],["Links are provided for examples with `LivestreamServiceClient`, `VideoStitcherServiceClient`, and `TranscoderServiceClient` classes, along with a link to best practices for managing service account keys."]]],[]]
