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::webrisk_v1::WebRiskServiceClient(
google::cloud::webrisk_v1::MakeWebRiskServiceConnection(options));
}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis webpage provides a list of WebRisk C++ client library versions, ranging from the latest release candidate \u003ccode\u003e2.37.0-rc\u003c/code\u003e down to version \u003ccode\u003e2.11.0\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe primary focus of the documentation is on how to override default authentication credentials using \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e in the Google Cloud C++ client libraries.\u003c/p\u003e\n"],["\u003cp\u003eOverriding default credentials involves providing service account key file contents to \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e through functions such as \u003ccode\u003eMakeServiceAccountCredentials\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe provided example demonstrates loading a service account key file to create \u003ccode\u003eWebRiskServiceClient\u003c/code\u003e with customized authentication, highlighting a simple approach for educational purposes.\u003c/p\u003e\n"],["\u003cp\u003eFor detailed information on creating \u003ccode\u003eCredentials\u003c/code\u003e objects, users are referred to the "Authentication Components" documentation, and for managing service accounts, the best practices guide is recommended.\u003c/p\u003e\n"]]],[],null,[]]
