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 2025-03-14 UTC."],[[["This page provides documentation for various versions of the C++ client library, ranging from version 2.11.0 up to the release candidate 2.37.0-rc, with links to documentation on video-override-authentication for each version."],["The client libraries default to using Application Default Credentials for authenticating with Google Cloud Services, but this can be overridden when necessary."],["The `UnifiedCredentialsOption` can be used to override default authentication, such as loading a service account key file explicitly, as shown in the example code snippet."],["Examples for overriding authentication are available for `video_livestream_v1::LivestreamServiceClient`, `video_stitcher_v1::VideoStitcherServiceClient`, and `video_transcoder_v1::TranscoderServiceClient`."],["For more information on creating `google::cloud::Credentials` objects, refer to the \"Authentication Components\" documentation."]]],[]]
