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 available is 2.37.0-rc, with numerous other versions, including the current version 2.16.0, also listed and accessible."],["Client libraries typically utilize Application Default Credentials for authenticating with Google Cloud Services, but this default can be overridden."],["You can override default authentication by supplying the UnifiedCredentialsOption, allowing you to load credentials from a service account key file."],["The provided code snippet illustrates how to load service account credentials from a key file, offering a straightforward example for overriding the authentication process."],["For more on constructing `google::cloud::Credentials` objects, refer to the Authentication Components section."]]],[]]
