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 2025-03-14 UTC."],[[["The latest release candidate version is 2.37.0-rc, and the page lists various previous versions down to 2.11.0, each linked to its respective documentation on asset-override authentication."],["The default authentication method for client libraries is Application Default Credentials, but this can be overridden when required for certain applications."],["You can override the default authentication credentials by using the `UnifiedCredentialsOption`, such as loading a service account key file as demonstrated in the provided code example."],["The example code provided shows how to explicitly load a service account key file, though users are advised to refer to best practices for managing service account keys for more detailed guidance."],["For a more comprehensive understanding of `google::cloud::Credentials` and their creation through factory functions, refer to the Authentication Components documentation."]]],[]]
