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::asset_v1::AssetServiceClient(
google::cloud::asset_v1::MakeAssetServiceConnection(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 2025-03-21 UTC."],[[["This webpage documents the available versions of the C++ Asset Override Authentication guide, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The client libraries typically use Application Default Credentials for authentication with Google Cloud Services, but this can be overridden when necessary."],["You can override the default authentication method by using the UnifiedCredentialsOption, demonstrated by loading a service account key file."],["The example provided shows how to load a service account key file, but users are encouraged to reference the Best practices for managing service account keys guide for managing those keys."],["For more information on creating `google::cloud::Credentials` objects, you can check out the Authentication Components guide."]]],[]]
