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 C++ client library versions for the Video Intelligence API, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The library uses Application Default Credentials for authentication with Google Cloud Services by default, but this can be overridden."],["Authentication can be overridden by providing the UnifiedCredentialsOption, which is demonstrated with an example of loading a service account key file."],["The provided example on how to override the authentication credentials is for illustrative purposes and does not show best practice, so it is recommended to consult the managing service account keys documentation."],["Further information on creating Credentials objects can be found in the Authentication Components documentation, linked at the bottom of the page."]]],[]]
