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::recaptchaenterprise_v1::
RecaptchaEnterpriseServiceClient(
google::cloud::recaptchaenterprise_v1::
MakeRecaptchaEnterpriseServiceConnection(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 available version is 2.37.0-rc, with multiple other versions, down to 2.12.0, also accessible."],["Client libraries typically use Application Default Credentials (ADC) for authentication with Google Cloud Services."],["You can override the default authentication by using `UnifiedCredentialsOption` to specify alternative credentials."],["Service account key files can be used to override authentication, as shown in the provided code example, but it is only an example for simplicity."],["For detailed information on managing service account keys and authentication, refer to the provided links to the best practices and authentication component documentation."]]],[]]
