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 2025-03-21 UTC."],[[["The latest version of the reCAPTCHA Enterprise client library is 2.37.0-rc, with multiple previous versions available for reference, ranging from 2.36.0 down to 2.12.0."],["By default, the client libraries use Application Default Credentials for authentication with Google Cloud Services."],["You can override the default authentication by utilizing the UnifiedCredentialsOption, such as loading a service account key file as shown in the provided code example."],["The provided code example demonstrates loading a service account key file using `UnifiedCredentialsOption` and `MakeServiceAccountCredentials`."],["The Authentication Components link provides more information on the factory functions to create `google::cloud::Credentials` objects."]]],[]]
