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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThe webpage provides a list of Web Security Scanner versions, ranging from the latest release candidate, 2.37.0-rc, down to version 2.11.0, each with a link to its specific documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe default authentication method for client libraries is Application Default Credentials, but users can override this using the UnifiedCredentialsOption.\u003c/p\u003e\n"],["\u003cp\u003eA service account key file can be explicitly loaded to override default authentication, as demonstrated in the example provided.\u003c/p\u003e\n"],["\u003cp\u003eFor details on managing service account keys, the document suggests referring to the "Best practices for managing service account keys" guide.\u003c/p\u003e\n"],["\u003cp\u003eThe "Authentication Components" documentation provides more information on creating \u003ccode\u003egoogle::cloud::Credentials\u003c/code\u003e objects using factory functions.\u003c/p\u003e\n"]]],[],null,[]]
