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::videointelligence_v1::VideoIntelligenceServiceClient(
google::cloud::videointelligence_v1::
MakeVideoIntelligenceServiceConnection(options));
}
[[["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 documents the various versions of the Video Intelligence C++ client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The latest stable version is 2.36.0, with a history of prior versions available for reference."],["The library uses Application Default Credentials (ADC) for authentication with Google Cloud Services by default, but it is possible to override them."],["Overriding the default credentials can be accomplished by using `UnifiedCredentialsOption` with the `MakeServiceAccountCredentials` function, exemplified by loading a service account key file."],["For further details on credentials management and creation, the documentation links to `Authentication Components` and `Best practices for managing service account keys`."]]],[]]
