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::websecurityscanner_v1::WebSecurityScannerClient(
google::cloud::websecurityscanner_v1::MakeWebSecurityScannerConnection(
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 document provides versioned documentation for the WebSecurityScanner, including the latest release candidate [2.37.0-rc] and a range of stable versions from 2.36.0 down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe guide explains how to override the default Application Default Credentials (ADC) used by client libraries for authentication with Google Cloud Services.\u003c/p\u003e\n"],["\u003cp\u003eThe example code demonstrates how to load a service account key file and use it to create a \u003ccode\u003eWebSecurityScannerClient\u003c/code\u003e with custom authentication credentials.\u003c/p\u003e\n"],["\u003cp\u003eIt references the "Best practices for managing service account keys" guide for detailed information and the "Authentication Components" for factory functions that create \u003ccode\u003egoogle::cloud::Credentials\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
